Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
cham xuc » cam xuc, chat xuc, cham soc
tu sach » su sach, te sach, tu cach
hieu su » hieu sau, tieu su, hieu so
sai cua » dai cua, hai cua, lai cua
dan sai » danh sai, doan sai, dan tai
cua tre » cua te, cuu tre, cua triet
hieu vu » hieu va, hieu ve, dieu vu
xuc va » duc va, tuc va, luc va
va dan » ca dan, va dao, va dau
x hoi » xa hoi, o hoi, x ho

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) or (thu sach)) ky nang x hoi. ((hieu vu) or (hieu su)) cham xuc va dan sai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ky nang x hoi. ((hieu vu) OR (hieu su)) cham xuc va dan sai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) ky nang x hoi. ((hieu vu) or (hieu su)) cham xuc va dan sai cua tre*.