Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
ty hang » ly hang, thi hang, thu hang
hieu va » lieu va, hieu qua
cam tuc » cam xuc, cam tu, nam thuc
dan vai » dan va, dan tai, dan vat
vai cuu » vai cua
cuu tre » cua tre, cau tren, cau treo
va cam » va cham, va cac, va cao
tuc va » thuc va, truc va, tuc xa
va dan » ca dan, va dao, va dau

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 ((ty xang) or (ty hang)) xa hoi. hieu va cam tuc va dan vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ty xang) OR (ty hang)) xa hoi. hieu va cam tuc va dan vai cuu tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ((ty xang) or (ty hang)) xa hoi. hieu va cam tuc va dan vai cuu tre*.