Perhaps you should try some spelling variations:
thanh trung » thanh tung
thong cong » trong cong, tong cong, thong thong
doi chieu » doc hieu, doi chi, ho chieu
trung vap » trung cap, trung va, trung van
vap thong » va thong, van thong, phap thong
thanh lap » thanh san, phan lap, thanh hai
cong ban » cong bang, cong san, cong tan
than cap » khan cap, thanh cac, than cua

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (hoc hien)) sang - thanh trung vap thong cong ban ((than cap) OR (thanh lap))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) or (hoc hien)) sang - thanh trung vap thong cong ban ((than cap) OR (thanh lap))~".
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (hoc hien)) sang - thanh trung vap thong cong ban ((than cap) OR (thanh lap))*.