Perhaps you should try some spelling variations:
qua cham » qua hai, qua cac, va cham
cham doc » cham soc, chat doc, chau doc
va thanh » gia thanh, ban thanh, va tinh
thanh vi » hanh vi, thanh va, thanh ve
mai hoi » mai khoi, dai hoi, lai hoi
cua tre » cua te, cuu tre, cua triet
tu sac » tu sach, tu san, tu bac
ma hoi » xa hoi, ma hoa, me hoi
doc va » duoc va, hoc va, duc va
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sac) or (tu cac)) ky nang ((ma hoi) or (mai hoi)). hieu qua cham doc va thanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sac) OR (tu cac)) ky nang ((ma hoi) OR (mai hoi)). hieu qua cham doc va thanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sac) or (tu cac)) ky nang ((ma hoi) or (mai hoi)). hieu qua cham doc va thanh vi cua tre*.