Perhaps you should try some spelling variations:
tranh tran » thanh tran, tranh toan, tranh tren
tran thong » toan thong, tran hong, tran trong
thong cong » trong cong, tong cong, thong thong
thi chieu » thi chien, thi hieu, theo chieu
ho chieu » theo chieu, hoc thieu, doi chieu
cong dan » cong san, cong tan, huong dan

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: ((ho chieu) OR (thi chieu)) xanh - canh tranh tran thong cong dan ((toan ban) OR (van ban))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (thi chieu)) xanh - canh tranh tran thong cong dan ((toan ban) OR (van ban))~".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (thi chieu)) xanh - canh tranh tran thong cong dan ((toan ban) OR (van ban))*.