Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hoc thieu » toc thieu, hoc hien
canh tran » canh tranh, hanh trang, banh trang
van nhung » van nhuong, va nhung, van hung
tran van » luan van
cong tan » cong tac, cong san, cong thanh
phan cac » phan dau, phan lap, phan 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 - canh tran van nhung ((cong tan) or (cong trinh)) ((phan cac) OR (nhan cach))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - canh tran van nhung ((cong tan) OR (cong trinh)) ((phan cac) OR (nhan cach)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - canh tran van nhung ((cong tan) or (cong trinh)) ((phan cac) OR (nhan cach))".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - canh tran van nhung ((cong tan) or (cong trinh)) ((phan cac) OR (nhan cach))*.