Perhaps you should try some spelling variations:
ve doanh » va doanh, de doanh, te doanh
cham cuu » cap cuu, chat cua
nang doc » nang luc
thu sai » thu hai, thu tai, thu san
hieu va » lieu va, hieu qua
tai cuu » tai cuc, tai buu, tai cua
cuu tre » cua tre, cau tren, cau treo
dieu vu » dien vu, dieu va, dieu cua
nang co » nang cao, nang noi, nang hoc
sai ky » sac ky
cuu ve » cuu va

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: thu sai ky ((nang co) OR (nang doc)) hoi. ((dieu vu) OR (hieu va)) cham cuu ve doanh tai cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sai ky ((nang co) OR (nang doc)) hoi. ((dieu vu) or (hieu va)) cham cuu ve doanh tai cuu tre~".
• Adding a wildcard symbol may retrieve word variants: thu sai ky ((nang co) OR (nang doc)) hoi. ((dieu vu) or (hieu va)) cham cuu ve doanh tai cuu tre*.