Perhaps you should try some spelling variations:
thien hieu » thien nhien, thien chien, thien hue
thong cong » trong cong, tong cong, thong thong
hieu lang » chieu sang, hieu quang, nhieu tang
cua thong » cua thuong, cua khong, cua tong
thanh tap » thanh lap, thanh tai, thanh tam
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 - van ban cua thong cong san ((thanh tap) OR (thanh tay))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thien hieu lang - van ban cua thong cong san ((thanh tap) OR (thanh tay))".
• Adding a wildcard symbol may retrieve word variants: thien hieu lang - van ban cua thong cong san ((thanh tap) OR (thanh tay))*.