Perhaps you should try some spelling variations:
thanh vi » hanh vi, thanh ve, thanh vo
thanh va » thanh van, hanh va, thanh ha
hieu van » hieu va, thien van, lieu va
nhanh vi » hanh vi, nhanh va, nhanh thi
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
cam tuc » cam xuc, cam tu, nam thuc
van cam » van nam, van lam, van cau
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
cua tre » cua te, cuu tre, cua triet
tuc va » thuc va, truc va, tuc xa

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky lang xa hoi. hieu van cam tuc va ((((thanh vi) or (nhanh vi))) or (thanh va)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky lang xa hoi. hieu van cam tuc va ((((thanh vi) OR (nhanh vi))) OR (thanh va)) cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky lang xa hoi. hieu van cam tuc va ((((thanh vi) or (nhanh vi))) or (thanh va)) cua tre*.