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