Perhaps you should try some spelling variations:
nghien trong » nghiep trong, nhien trong, nghe trong
nguyen trong » nguyen thanh, nguyen quang
hinh trong » chinh trong, dinh trong, sinh trong
doi chieu » doc hieu, doi chi, mot chieu
ho chieu » theo chieu, hoc thieu, mot chieu
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cao » toan ban, toan tap

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((doi chieu) or (ho chieu)) xanh - hinh trong ((nghien trong) OR (nguyen trong)) cong tac toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (ho chieu)) xanh - hinh trong ((nghien trong) OR (nguyen trong)) cong tac toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) or (ho chieu)) xanh - hinh trong ((nghien trong) OR (nguyen trong)) cong tac toan cao".
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (ho chieu)) xanh - hinh trong ((nghien trong) OR (nguyen trong)) cong tac toan cao*.