Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
chieu sang » chieu sach, chieu xanh, hieu lang
thien van » thi van
tranh va » tranh van, trang va, trinh va
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cao » toan ban, toan tap
hieu ve » hieu va, hieu van

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chieu sang) or (((hieu ve) or (thien van)))) - canh tranh va nhung cong tac toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sang) OR (((hieu ve) OR (thien van)))) - canh tranh va nhung cong tac toan cao.
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sang) or (((hieu ve) or (thien van)))) - canh tranh va nhung cong tac toan cao*.