Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hanh trinh » canh tranh, hanh chinh
hoc thieu » toc thieu, hoc hien
chua bang » chua nang, chua xang, thuat bang
chu bang » thu bang, chuc nang, chu quang
cong tan » cong tac, cong san, cong thanh
tra cau » tra sau, ta cau, tra cuu
ran cau » van cau, ban cau, can cau

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 - hanh trinh ((chua bang) or (chu bang)) cong tan ((tra cau) or (ran cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - hanh trinh ((chua bang) OR (chu bang)) cong tan ((tra cau) OR (ran cau)).
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - hanh trinh ((chua bang) or (chu bang)) cong tan ((tra cau) or (ran cau))*.