Perhaps you should try some spelling variations:
thanh tuong » thanh thuong, thanh tung, thanh huong
nhieu tang » chieu sang, nhiet nang
luong cong » dung cong, trong cong, cong cong
cong thanh » dong thanh, cong trinh, cong tan
hieu lang » chieu sang, hieu quang, hieu van
tuong cua » truong cua, huong cua, thong cua
cua luong » cu luong, cua huong, chat luong
tran huu » tran duc
toan tap » toan ban

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

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