Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
tu sach » thu sach, su sach, te sach
dan vai » dan va, dan tai, dan vat
vai cua » dai cua, hai cua, lai cua
nang ma » tang ma, sang ma, nang cao
ma hoi » mai hoi, xa hoi, ma hoa
va cao » va cac, va co, va dao
luc va » duc va, tuc va, loc va
va dan » ca dan, va dao, va dau
ve cam » ve cham, ve cac, va cam

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) OR (hoc sach)) ky nang ma hoi. hieu ((ve cam) OR (va cao)) luc va dan vai cua vat~.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (hoc sach)) ky nang ma hoi. hieu ((ve cam) or (va cao)) luc va dan vai cua vat*.