Perhaps you should try some spelling variations:
thanh tran » thanh trang, thanh toan, thanh tra
hoc thieu » toc thieu
nang cong » nang song, dang cong, bang cong
cong manh » cong danh, duong manh, cong thanh
tran van » luan van
van nang » van quang, van ban, van dong
toan ban » van ban

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