Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
tan thanh » tran thanh, tang thanh, toan thanh
cua tre » cua te, cuu tre, cua triet
cam duc » cam xuc, cao duc, pham duc
ky tang » ky nang, kho tang, ky trong
hai cua » thai cua, dai cua, hoi cua
ky dang » ky nang, ky danh
hieu ve » hieu van
hieu va » lieu va, hieu qua
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 va)) cam duc tan thanh hai 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 va)) cam duc tan thanh hai cua tre.
• Adding a wildcard symbol may retrieve word variants: su sac ((ky tang) or (ky dang)) xa hoi. ((hieu ve) or (hieu va)) cam duc tan thanh hai cua tre*.