Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
hieu van » hieu va, thien van, lieu va
cua tre » cua te, cuu tre, cua triet
ky tang » ky nang, ky dang, kho tang
tang xa » trang xa, tang ma, lang xa
van lam » van nam
tuc va » thuc va, truc va, tuc xa
tu sac » tu sach, tu cac, tu san
luc va » duc va, loc va
sac ky » cac ky, sai ky
xuc va » duc va, xac va

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky tang xa hoi. hieu van lam ((xuc va) or (((luc va) OR (tuc va)))) thanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky tang xa hoi. hieu van lam ((xuc va) OR (((luc va) OR (tuc va)))) thanh dai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky tang xa hoi. hieu van lam ((xuc va) or (((luc va) OR (tuc va)))) thanh dai cua tre*".