Perhaps you should try some spelling variations:
muong dai » duong dai, mung dai, tuong dai
xa muong » ca muong, xa truong, xa dong
so sach » so sanh, bo sach, co sach
hieu va » lieu va, hieu qua
cam tuc » cam xuc, nam thuc, dam thuc
sach ty » sach y, sach tu, sach thu
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu van
cao hoi » cau hoi, co hoi, cao hoc
ty nang » ky nang, ty xang, ty hang
cam tu » cam thu, nam tu, dam tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ty nang cao hoi. ((hieu ve) OR (hieu va)) ((cam tuc) or (cam tu)) xa muong dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ty nang cao hoi. ((hieu ve) OR (hieu va)) ((cam tuc) OR (cam tu)) xa muong dai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ty nang cao hoi. ((hieu ve) OR (hieu va)) ((cam tuc) or (cam tu)) xa muong dai cua tre*".