Perhaps you should try some spelling variations:
hanh dai » hanh tai, hanh dao, vanh dai
cua viet » ca viet, hoa viet, cua vat
so sach » so sanh, bo sach, co sach
sach ty » sach y, sach tu, sach thu
ty lang » tay lang, ty xang, ty hang
lang xa » lang ha, dang xay, lang van
qua cam » qua cham, qua cac, qua ca
xuc va » tuc va, luc va, xac va

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 lang xa hoi. hieu qua cam ((xuc va) or (duc va)) hanh dai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ty lang xa hoi. hieu qua cam ((xuc va) OR (duc va)) hanh dai cua viet.
• Adding a wildcard symbol may retrieve word variants: so sach ty lang xa hoi. hieu qua cam ((xuc va) or (duc va)) hanh dai cua viet*.