Perhaps you should try some spelling variations:
thanh trung » thanh tung
thieu xanh » chieu xanh, hieu manh, thien anh
mien trung » tieng trung, viet trung
hieu tuong » hieu truong, bieu tuong, dieu tuong
hoc thieu » toc thieu, hoc hien
cong tan » cong tac, cong san, cong thanh
tran van » luan van

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thieu xanh - thanh trung ((mien trung) or (hieu tuong)) cong tan tran van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - thanh trung ((mien trung) OR (hieu tuong)) cong tan tran van.
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - thanh trung ((mien trung) or (hieu tuong)) cong tan tran van*.