Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
van hanh » van thanh, ban hanh, van anh
hanh vai » hanh vi, hanh va, hanh tai
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
xuc van » duc van, luc van, vuc van
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
ve cam » ve cham, ve cac, va cam

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach y ((nang ma) or (van xay)) hoi. hieu ve cam xuc van hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y ((nang ma) OR (van xay)) hoi. hieu ve cam xuc van hanh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: thu sach y ((nang ma) or (van xay)) hoi. hieu ve cam xuc van hanh vai cua tre*.