Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
van hanh » van thanh, ban hanh, van anh
doi cua » dai cua, hoi cua
vuc van » duc van, luc van, thuc van
cam vuc » cam xuc
hieu ve » hieu va, hieu van
vu nang » vuc nang, va nang, vu dang
ma hoi » mai hoi, xa hoi, ma hoa
ve cam » ve cham, ve cac, va cam
di cua » dai cua, de cua, do cua
v nang » va nang, van nang, voi nang

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: hoc sach ((v nang) OR (vu nang)) ma hoi. hieu ve cam vuc van hanh ((di cua) OR (doi cua)) tu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sach ((v nang) or (vu nang)) ma hoi. hieu ve cam vuc van hanh ((di cua) OR (doi cua)) tu~".
• Adding a wildcard symbol may retrieve word variants: hoc sach ((v nang) or (vu nang)) ma hoi. hieu ve cam vuc van hanh ((di cua) OR (doi cua)) tu*.