Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
dinh lap » dinh lam, trinh lap, dinh lang
dinh lai » dinh lam, dinh tai, dinh hai
xuc van » duc van, luc van, vuc van
vu cham » va cham, vu kham, tu cham
su cham » su pham, tu cham, qua cham
lang xa » lang ha, dang xay, lang van
cua tre » cua te, cuu tre, cua triet
y lang » o lang, _ lang, tay lang

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sach y lang xa hoi. hieu ((su cham) OR (vu cham)) xuc van ((dinh lai) or (dinh lap)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach y lang xa hoi. hieu ((su cham) OR (vu cham)) xuc van ((dinh lai) OR (dinh lap)) cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sach y lang xa hoi. hieu ((su cham) OR (vu cham)) xuc van ((dinh lai) or (dinh lap)) cua tre*".