Perhaps you should try some spelling variations:
cam thuc » am thuc, nam thuc, cam thu
ban hang » ngan hang
dan hang » van hang, dat hang, dai hang
te sach » toc sach
loi cuu » loi cau, loi luu, loai cua
cuu tre » cua tre, cau tren, cau treo
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
so sanh » do sanh
ve cam » ve cham, ve cac, va cam

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: ((te sach) OR (so sanh)) ky nang xa hoi. hieu ve cam thuc ((dan hang) OR (ban hang)) loi cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (so sanh)) ky nang xa hoi. hieu ve cam thuc ((dan hang) OR (ban hang)) loi cuu tre~".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (so sanh)) ky nang xa hoi. hieu ve cam thuc ((dan hang) OR (ban hang)) loi cuu tre*.