Perhaps you should try some spelling variations:
chua nang » chuc nang, chua xang, kha nang
tang luan » dung luan
bang cong » dang cong, hang cong, dung cong
bang song » nang song
hinh toan » tinh toan, thanh toan, trinh toan
anh tang » anh bang, anh dang, anh nang
toan cao » toan ban, toan tap
thu ban » thu hang

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chua nang) or (thu ban)) - anh tang luan ((bang cong) OR (bang song)) hinh toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chua nang) OR (thu ban)) - anh tang luan ((bang cong) OR (bang song)) hinh toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chua nang) or (thu ban)) - anh tang luan ((bang cong) OR (bang song)) hinh toan cao".
• Adding a wildcard symbol may retrieve word variants: theo ((chua nang) or (thu ban)) - anh tang luan ((bang cong) OR (bang song)) hinh toan cao*.