Perhaps you should try some spelling variations:
ban thanh » ban hang
ban hanh » ban hang
vu sach » vu bach, su sach, vu khach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
cam luc » cam xuc, cau luc
va hanh » van hanh, va thanh, va danh
chat ca » chat cua, chat cam, chat cao
ca viet » va viet, co viet, hoa viet
va cam » va cham, va cac, va cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ty nang ma hoa. hieu va cam luc ((((va hanh) or (ban hanh))) or (ban thanh)) chat ca viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ty nang ma hoa. hieu va cam luc ((((va hanh) OR (ban hanh))) OR (ban thanh)) chat ca viet.
• Adding a wildcard symbol may retrieve word variants: vu sach ty nang ma hoa. hieu va cam luc ((((va hanh) or (ban hanh))) or (ban thanh)) chat ca viet*.