Perhaps you should try some spelling variations:
thanh thai » thanh hai, thanh tai, nhanh thai
tan thanh » tran thanh, tang thanh, toan thanh
cham duc » pham duc, cham soc, pham duy
thai cua » than cua, tai cuc, tri cua
hieu van » hieu va, thien van, lieu va
cua tre » cua te, cuu tre, cua triet
ky tang » ky nang, kho tang, ky trong
ky dang » ky nang, ky danh
hieu ve » hieu va
su sac » su sach, su cac, su xac

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sac ((ky tang) or (ky dang)) xa hoi. ((hieu ve) OR (hieu van)) cham duc tan thanh thai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ((ky tang) OR (ky dang)) xa hoi. ((hieu ve) OR (hieu van)) cham duc tan thanh thai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ((ky tang) or (ky dang)) xa hoi. ((hieu ve) OR (hieu van)) cham duc tan thanh thai cua tre".
• Adding a wildcard symbol may retrieve word variants: su sac ((ky tang) or (ky dang)) xa hoi. ((hieu ve) OR (hieu van)) cham duc tan thanh thai cua tre*.