Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
sach thu » sach thue, sach thieu, sach tham
hieu van » hieu va, thien van, lieu va
xuc van » duc van, luc van, vuc van
van cam » van nam, van lam, van cau
nang ma » tang ma, sang ma, nang cao
sach tu » cach tu, sach ty, sach uu
cua tre » cua te, cuu tre, cua triet
vi cua » vai cua, di cua

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