Perhaps you should try some spelling variations:
nhieu tang » chieu sang, nhiet nang
thanh tung » thanh cong
thong cong » trong cong, tong cong, thong thong
hieu lang » chieu sang, hieu quang, hieu van
ha thong » hoa thong, nha thong, he thong
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van 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: ho ((hieu lang) or (nhieu tang)) - ((thanh trung) OR (thanh tung)) ha thong cong tan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu lang) OR (nhieu tang)) - ((thanh trung) OR (thanh tung)) ha thong cong tan toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu lang) or (nhieu tang)) - ((thanh trung) OR (thanh tung)) ha thong cong tan toan cao".
• Adding a wildcard symbol may retrieve word variants: ho ((hieu lang) or (nhieu tang)) - ((thanh trung) OR (thanh tung)) ha thong cong tan toan cao*.