Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
cham xuc » cam xuc, chat xuc, cham soc
tinh vai » tinh va, tinh hai, tinh bai
hieu va » hieu qua
xuc may » xuc hay, truc may, phuc may
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet

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 ((van xay) or (nang x)) hoi. ((hieu va) OR (lieu va)) cham xuc may tinh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach y ((van xay) OR (nang x)) hoi. ((hieu va) OR (lieu va)) cham xuc may tinh vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sach y ((van xay) or (nang x)) hoi. ((hieu va) OR (lieu va)) cham xuc may tinh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: hoc sach y ((van xay) or (nang x)) hoi. ((hieu va) OR (lieu va)) cham xuc may tinh vai cua tre*.