Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
cham xuc » cam xuc, chat xuc, cham soc
dang xay » dang van, van xay
bo sach » co sach
minh vi » minh voi, dinh vi, minh va
xuc van » duc van, luc van, vuc van
va cham » va chat, va tham
hieu va » lieu va, hieu qua
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: ((bo sach) OR (hoc sach)) y ((nang x) or (dang xay)) hoi. hieu va cham xuc van minh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((bo sach) OR (hoc sach)) y ((nang x) OR (dang xay)) hoi. hieu va cham xuc van minh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((bo sach) OR (hoc sach)) y ((nang x) or (dang xay)) hoi. hieu va cham xuc van minh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: ((bo sach) OR (hoc sach)) y ((nang x) or (dang xay)) hoi. hieu va cham xuc van minh vi cua tre*.