Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
canh tran » canh tranh, hanh trang, banh trang
van nhung » van nhuong, va nhung, van hung
tran van » luan van
cong dan » cong tan, cong dong, cong tac
cong san » cong tac
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc thieu xanh - canh tran van nhung ((((cong dan) or (cong san))) or (huong dan)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc thieu xanh - canh tran van nhung ((((cong dan) OR (cong san))) OR (huong dan)) toan cau.
• Adding a wildcard symbol may retrieve word variants: toc thieu xanh - canh tran van nhung ((((cong dan) or (cong san))) or (huong dan)) toan cau*.