Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
ban hang » ngan hang
ve cham » va cham, ve chat, vu cham
so sanh » do sanh
sanh ky » hanh ky, sang ky, nganh ky
nang ma » tang ma, sang ma, nang cao
ve cam » ve cac, va cam, ve cai
ma hoi » mai hoi, xa hoi, ma hoa
va cua » va chua, via cua, ca cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sanh ky nang ma hoi. hieu ((ve cam) OR (ve cham)) tuc ((ban hanh) or (ban hang)) va cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sanh ky nang ma hoi. hieu ((ve cam) OR (ve cham)) tuc ((ban hanh) OR (ban hang)) va cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sanh ky nang ma hoi. hieu ((ve cam) OR (ve cham)) tuc ((ban hanh) or (ban hang)) va cua viet".
• Adding a wildcard symbol may retrieve word variants: so sanh ky nang ma hoi. hieu ((ve cam) OR (ve cham)) tuc ((ban hanh) or (ban hang)) va cua viet*.