Perhaps you should try some spelling variations:
thanh vi » hanh vi, thanh va, thanh ve
hieu van » hieu va, thien van, lieu va
cua tre » cua te, cuu tre, cua triet
tu sach » thu sach, su sach, te sach
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa
vi cua » vai cua, di cua
tu sac » tu cac, tu san, tu bac
x hoi » xa hoi, o hoi, x ho

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) or (tu sach)) ky nang x hoi. hieu van nam ((xuc va) or (tuc va)) thanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sac) OR (tu sach)) ky nang x hoi. hieu van nam ((xuc va) OR (tuc va)) thanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sac) or (tu sach)) ky nang x hoi. hieu van nam ((xuc va) or (tuc va)) thanh vi cua tre*.