Perhaps you should try some spelling variations:
doi chieu » doi chi, ho chieu, mot chieu
chua xang » chua nang, chuc nang, chu bang
doc hieu » toc thieu, hoc thieu, hoc hien
kha nang » phap nang, ky nang, ki nang
cong tan » cong tac, cong san, cong thanh
tan thai » tay thai, ban thai, tan tai
thai cao » tai cao, thoai cac, thuat cao

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (doc hieu)) xanh - canh tranh ((chua xang) OR (kha nang)) cong tan thai cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) OR (doc hieu)) xanh - canh tranh ((chua xang) or (kha nang)) cong tan thai cao~".
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) OR (doc hieu)) xanh - canh tranh ((chua xang) or (kha nang)) cong tan thai cao*.