Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
tan thanh » tran thanh, tang thanh, toan thanh
kho tang » cao tang
hieu van » hieu va, thien van, lieu va
cuu tre » cua tre, cau tren, cau treo
cam duc » cam xuc, cao duc, pham duc
dai cuu » dai cua, dai huu
hieu ve » hieu va
su sac » su sach, su cac, su xac
ma hoi » mai hoi, xa hoi, ma hoa

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 ((kho tang) or (ky nang)) ma hoi. ((hieu ve) or (hieu van)) cam duc tan thanh dai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ((kho tang) OR (ky nang)) ma hoi. ((hieu ve) OR (hieu van)) cam duc tan thanh dai cuu tre.
• Adding a wildcard symbol may retrieve word variants: su sac ((kho tang) or (ky nang)) ma hoi. ((hieu ve) or (hieu van)) cam duc tan thanh dai cuu tre*.