Perhaps you should try some spelling variations:
ban hanh » ban hang
te sach » toc sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
hieu va » lieu va, hieu qua
cac duc » cac du, cao duc, cac dac
doi cua » dai cua, hoi cua
ma hoi » mai hoi, xa hoi, me hoi
cua tu » cua tuc, cua su, cua cu

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 ty nang ((ma hoi) OR (ma hoa)). hieu va cac duc ((van ban) OR (ban hanh)) doi cua tu~.
• Adding a wildcard symbol may retrieve word variants: te sach ty nang ((ma hoi) or (ma hoa)). hieu va cac duc ((van ban) or (ban hanh)) doi cua tu*.