Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hien xanh » hien hanh, hien nhanh, chieu xanh
chua xang » chua nang, chuc nang, chu bang
chu quang » chat quang, vu quang
cong tan » cong tac, cong san, cong thanh
tran cau » tran chau, toan cau, tra cau
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 hien xanh - hanh trinh ((chua xang) or (chu quang)) cong tan ((tran cau) or (ran cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - hanh trinh ((chua xang) OR (chu quang)) cong tan ((tran cau) OR (ran cau)).
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - hanh trinh ((chua xang) or (chu quang)) cong tan ((tran cau) or (ran cau))*.