Perhaps you should try some spelling variations:
cham duc » pham duc, cham soc, pham duy
ky tang » ky dang, kho tang, ky trong
hieu va » lieu va, hieu qua
va cham » va chat, va tham
han tai » hang tai, nhan tai, van tai
tai cua » thai cua, tai cuc, tri cua
cua tre » cua te, cuu tre, cua triet
te cac » tu cac, ve cac, te cao
tu san » thu san, tu ban, tu can
va han » va phan, van han, va hanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te cac) or (tu san)) ((ky tang) OR (ky nang)) xa hoi. hieu va cham duc va han tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te cac) OR (tu san)) ((ky tang) OR (ky nang)) xa hoi. hieu va cham duc va han tai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te cac) or (tu san)) ((ky tang) OR (ky nang)) xa hoi. hieu va cham duc va han tai cua tre*".