Perhaps you should try some spelling variations:
ban hanh » ban hang
van hanh » van thanh, van anh, van ban
te sach » toc sach
hac duc » hoc duc, ha duc, thach duc
hieu va » lieu va, hieu qua
ty hang » ly hang, ty xang, thi hang
ty nang » ky nang, ty xang, ly nang
cua tuc » cua duc, cua tu, cua thuoc
ma hoi » mai hoi, xa hoi, ma hoa
va hac » van hac, va khac, va cac
di cua » dai cua, doi cua, de cua

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