Perhaps you should try some spelling variations:
thanh tran » thanh trang, thanh toan, thanh tra
nang luong » nang song
hoc thieu » hoc hien
van luong » van duong, van cuong, van chuong
dan khoan » dan khoa, dai khoang, toan khoan
cong dan » cong san, cong tan, huong dan
khoan va » doan va, khoa ma, nhan va

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: ((hoc thieu) OR (toc thieu)) xanh - thanh tran ((van luong) OR (nang luong)) cong dan khoan va~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc thieu) or (toc thieu)) xanh - thanh tran ((van luong) OR (nang luong)) cong dan khoan va~".
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (toc thieu)) xanh - thanh tran ((van luong) OR (nang luong)) cong dan khoan va*.