Perhaps you should try some spelling variations:
nhieu tang » chieu sang, nhiet nang
thong cong » trong cong, tong cong, thong thong
hieu lang » chieu sang, hieu quang, hieu van
cua thong » cua thuong, cua khong, cua tong
thanh lap » thanh san, phan lap, thanh hai
thanh tay » thanh tai, thanh toan, thanh thuy
cong san » cong tac
ban cua » ban quan

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

• Performing a fuzzy search may retrieve terms with similar spellings: thien ((hieu lang) OR (nhieu tang)) - van ban cua thong cong san ((thanh lap) or (thanh tay))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thien ((hieu lang) OR (nhieu tang)) - van ban cua thong cong san ((thanh lap) OR (thanh tay)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thien ((hieu lang) OR (nhieu tang)) - van ban cua thong cong san ((thanh lap) or (thanh tay))".
• Adding a wildcard symbol may retrieve word variants: thien ((hieu lang) OR (nhieu tang)) - van ban cua thong cong san ((thanh lap) or (thanh tay))*.