Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
lanh manh » lanh tranh, lan anh, van manh
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cao » toan ban, toan tap
doi chi » doi khi
manh va » hanh va, anh va, minh va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((toc thieu) or (doi chi)) tinh - lanh manh va nhung cong tac toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc thieu) OR (doi chi)) tinh - lanh manh va nhung cong tac toan cao*.