Perhaps you should try some spelling variations:
sach thu » sach thue, sach thieu, sach tham
thu hang » thi hang, thuc hanh, thu huong
ban hanh » ban hang
van hanh » van thanh, van anh, van ban
tu sach » thu sach, su sach, te sach
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
hang xa » hoang xa, hang va, hang ca
ve cam » ve cham, va cam, ve cai
ve cac » va cac, vien cac

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

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