Perhaps you should try some spelling variations:
thien nang » thien bang, thien dang, trien nang
cong vang » cong lang, cong quang, cong ngang
tranh va » tranh van, trang va, trinh va
cong van » cong san, song van, cong tan
toan cao » toan ban, toan tap
va dung » van dung, va duong, vat dung
hoan » hoang, hoa, soan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoan thien nang - canh tranh va dung ((cong van) or (cong vang)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoan thien nang - canh tranh va dung ((cong van) OR (cong vang)) toan cao*.