Perhaps you should try some spelling variations:
doi khieu » doi chieu, doc hieu, doi hien
trong dan » trong dang, trong san, trong tan
tac dung » sach dung, xay dung, tin dung
dung cua » dung luan, dung cho
tong dan » tuong dan, thong dan, cong dan
phan cau » phan dau, phan cac, phan tu
cua han » cua hang, cua nhan, cua phan

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doi khieu) or (doi khi)) xanh - tac dung cua han ((tong dan) OR (trong dan)) phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi khieu) OR (doi khi)) xanh - tac dung cua han ((tong dan) OR (trong dan)) phan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi khieu) or (doi khi)) xanh - tac dung cua han ((tong dan) OR (trong dan)) phan cau".
• Adding a wildcard symbol may retrieve word variants: ((doi khieu) or (doi khi)) xanh - tac dung cua han ((tong dan) OR (trong dan)) phan cau*.