Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
tan thanh » tran thanh, tang thanh, toan thanh
hieu van » hieu va, thien van, lieu va
cua tre » cua te, cuu tre, cua triet
cam duc » cao duc, pham duc, nam duoc
hai cua » thai cua, dai cua, hoi cua
ky tang » ky nang, ky dang, kho tang
ky lang » ky nang, ky dang, tay lang
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 lang) OR (ky tang)) xa hoi. hieu van ((cam duc) or (cam xuc)) tan thanh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ((ky lang) OR (ky tang)) xa hoi. hieu van ((cam duc) OR (cam xuc)) tan thanh hai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ((ky lang) OR (ky tang)) xa hoi. hieu van ((cam duc) or (cam xuc)) tan thanh hai cua tre".
• Adding a wildcard symbol may retrieve word variants: su sac ((ky lang) OR (ky tang)) xa hoi. hieu van ((cam duc) or (cam xuc)) tan thanh hai cua tre*.