Perhaps you should try some spelling variations:
pham duy » pham duc
cham duc » pham duc, cham soc, phan duc
cua tre » cua te, cuu tre, cua triet
tai cua » thai cua, tai cuc, tri cua
han tai » hang tai, nhan tai, van tai
hieu va » lieu va, hieu qua
tang xa » trang xa, tang ma, lang xa
ky tang » ky nang, ky dang, kho tang
va han » va phan, van han, va hanh
tu san » thu san, tu ban, tu can
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: ((ve cac) or (tu san)) ky tang xa hoi. hieu va ((cham duc) OR (pham duy)) va han tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ve cac) OR (tu san)) ky tang xa hoi. hieu va ((cham duc) OR (pham duy)) va han tai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ve cac) or (tu san)) ky tang xa hoi. hieu va ((cham duc) OR (pham duy)) va han tai cua tre*".