Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
mai hoi » mai khoi, dai hoi, lai hoi
cam luc » cam xuc, cau luc
hieu ve » hieu va, hieu van
ma hoi » xa hoi, ma hoa, me hoi
y nang » ky nang, ly nang, v nang
ve cam » ve cham, ve cac, va cam
luc va » duc va, tuc va, loc va
va dan » ca dan, va dao, va dau
di cua » doi cua, de cua, do 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: tu sach y nang ((ma hoi) OR (mai hoi)). hieu ve cam luc va dan ((di cua) OR (dai cua)) te~.
• Adding a wildcard symbol may retrieve word variants: tu sach y nang ((ma hoi) or (mai hoi)). hieu ve cam luc va dan ((di cua) or (dai cua)) te*.