Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
sach ty » sach y, sach thu, xach tay
xuc van » duc van, luc van, xuc ban
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
cach tu » cach thuc
sach tu » sach thu, sach uu, sach xu
cua tre » cua te, cuu tre, cua triet
va cam » va cham, va cac, va cao
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: te ((sach ty) or (((sach tu) OR (cach tu)))) nang xa hoi. hieu va cam xuc van hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ty) OR (((sach tu) OR (cach tu)))) nang xa hoi. hieu va cam xuc van hanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ty) or (((sach tu) OR (cach tu)))) nang xa hoi. hieu va cam xuc van hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: te ((sach ty) or (((sach tu) OR (cach tu)))) nang xa hoi. hieu va cam xuc van hanh vi cua tre*.