proper google search technique

Now-a-days,there is a say.You want to know or learn something;ask the Google.Whatever you search in google to be informed,google will provide you the information.But sometimes search results don't work as it should do because of so much information gathering in google.So if we want to have better result from google,we have to search in a proper way.

Such as:
*when we type "google.com",it automatically redirect us to its local version or local server.That means, if we search "google.com", then we actually are using our own countries server.For better result from google,we can type google.com/ncr.It redirects us to google's main server and we can have good search results.

*When type key words for searching,it should be simple and web friendly.such as:if we want to know about economic condition of USA;we can type: economic condition of USA.

*We can easily search for people and social profiles using "+[profile name]

*Using '#'before a word,we can search for hashtags in so many social networks.

*we can search for social accounts associated with a person's name by writing @ sign before his/her name.

*We can search specific filetype file in google using [filetype:type key words]
   Such as: [filetype: pdf free science fiction book].

*Tourism site:www.facebook.com will show only tourism related pages within facebook.