Perhaps you should try some spelling variations:
thanh trung » thanh tung
hieu lang » chieu sang, hieu quang, nhieu tang
dung cong » dung trong
doc hieu » toc thieu, hoc thieu, hoc hien
trung ap » trung cap, trung lap, trung tam
cong dan » cong san, cong tan, huong dan
than cap » thanh lap, thanh cac, than cua
khan cap » khan ap, khoan cam, phan cac
ap dung » xay dung, van dung

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 - thanh trung ap dung cong dan ((than cap) OR (khan cap))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu lang - thanh trung ap dung cong dan ((than cap) OR (khan cap))".
• Adding a wildcard symbol may retrieve word variants: doc hieu lang - thanh trung ap dung cong dan ((than cap) OR (khan cap))*.