Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
sach ty » sach y, sach thu, xach tay
sach tu » sach thu, cach tu, sach uu
nang xa » nang x, lang xa, nang ma
van tao » van thao, vang tao, van tai
duoc va » nuoc va, duc va, duoc ma
va hanh » van hanh, va thanh, va danh
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: thuat ((sach ty) OR (sach tu)) nang xa hoi. hieu van tao duoc va hanh vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat ((sach ty) OR (sach tu)) nang xa hoi. hieu van tao duoc va hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: thuat ((sach ty) OR (sach tu)) nang xa hoi. hieu van tao duoc va hanh vi cua tre*.