Perhaps you should try some spelling variations:
hanh tai » thanh tai, hang tai, han tai
cham xuc » cam xuc, chat xuc, cham soc
tu sach » thu sach, su sach, te sach
hieu va » lieu va, hieu qua
tai cua » thai cua, tai cuc, tri cua
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu van
sang ma » tang ma, sang tao, mang may
nang ma » tang ma, nang cao, mang may
xuc va » duc va, tuc va, luc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach y ((nang ma) OR (sang ma)) hoi. ((hieu ve) or (hieu va)) cham xuc va hanh tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y ((nang ma) OR (sang ma)) hoi. ((hieu ve) OR (hieu va)) cham xuc va hanh tai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y ((nang ma) OR (sang ma)) hoi. ((hieu ve) or (hieu va)) cham xuc va hanh tai cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach y ((nang ma) OR (sang ma)) hoi. ((hieu ve) or (hieu va)) cham xuc va hanh tai cua tre*.