Perhaps you should try some spelling variations:
gia hanh » gia thanh, giao hanh, gia anh
thuc gia » thuc giai, thue gia, thuc dia
sach thu » sach thue, sach thieu, sach tham
hac thuc » hoc thuc, ha thuc, thach thuc
hieu van » hieu va, thien van, lieu va
van hac » van hoc, van ha, van hai
nang xa » nang x, lang xa, nang ma
sach ty » sach y, sach tu, xach tay
cua tre » cua te, cuu tre, cua triet
sac ky » cac ky, sai ky
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: vu ((((sach ty) or (sach thu))) or (sac ky)) nang xa hoi. hieu van hac thuc gia hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu ((((sach ty) OR (sach thu))) OR (sac ky)) nang xa hoi. hieu van hac thuc gia hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: vu ((((sach ty) or (sach thu))) or (sac ky)) nang xa hoi. hieu van hac thuc gia hanh vi cua tre*.