Perhaps you should try some spelling variations:
xa truong » cac truong
nam thuc » nam thuoc, am thuc, nam thu
so sach » so sanh, bo sach, co sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
hieu va » lieu va, hieu qua
thuc xa » thuc xay, tuc xa, thuc va
doi cua » hoi cua
va nam » van nam, ha nam, va nay
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: so sach ty nang x hoi. hieu va nam thuc xa truong ((doi cua) or (dai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ty nang x hoi. hieu va nam thuc xa truong ((doi cua) OR (dai cua)) tre.
• Adding a wildcard symbol may retrieve word variants: so sach ty nang x hoi. hieu va nam thuc xa truong ((doi cua) or (dai cua)) tre*.