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 tam, thanh tan
thanh tay » thanh toan, thanh thuy, thanh san
thanh tai » thanh hai, thanh toan, doanh tai
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) OR (thanh tai))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thien hieu lang - van ban cua thong cong san ((thanh tap) OR (((thanh tay) OR (thanh tai)))).
• 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) OR (thanh tai))))".
• Adding a wildcard symbol may retrieve word variants: thien hieu lang - van ban cua thong cong san ((thanh tap) or (((thanh tay) OR (thanh tai))))*.