Perhaps you should try some spelling variations:
hoc thieu » toc thieu, hoc hien
thi chieu » thi chien, thi hieu, theo chieu
hanh tang » hanh trang, anh tang, hanh mang
dung cong » dung trong
tran van » luan van
tang va » trang va, tang van, thang va
va dung » van dung, va duong, vat dung
san van » tan van, luan van, dang 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) or (thi chieu)) xanh - hanh tang va dung cong ((san van) OR (tran van)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (thi chieu)) xanh - hanh tang va dung cong ((san van) OR (tran van)) cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc thieu) or (thi chieu)) xanh - hanh tang va dung cong ((san van) OR (tran van)) cau*".