Perhaps you should try some spelling variations:
ban hanh » ban hang
van hanh » van thanh, van anh, van ban
su sach » so sach, vu sach
ty nang » ky nang, ty xang, ty hang
nang ma » tang ma, sang ma, nang cao
sach ty » sach y, sach tu, sach thu
di cua » dai cua, doi cua, de cua
va cam » va cham, va cac, va cao
ve cam » ve cham, ve cac, ve cai
ma hoi » mai hoi, xa hoi, ma hoa

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: su sach ty nang ma hoi. hieu ((ve cam) OR (va cam)) xuc ((van hanh) OR (ban hanh)) di cua vat~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty nang ma hoi. hieu ((ve cam) or (va cam)) xuc ((van hanh) OR (ban hanh)) di cua vat~".
• Adding a wildcard symbol may retrieve word variants: su sach ty nang ma hoi. hieu ((ve cam) or (va cam)) xuc ((van hanh) OR (ban hanh)) di cua vat*.