Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
vat hang » van hang, dat hang, va hang
nam thuc » nam thuoc, am thuc, nam thu
hang vi » hang va, hanh vi, hang di
hieu va » hieu qua
sach lo » sach dao, sach doi, sach hoi
tu sach » thu sach, su sach, te sach
lang xa » lang ha, dang xay, lang van
sang xa » song xa, sang ma, mang xa
vi cua » vai cua, di cua

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 lo ((sang xa) or (lang xa)) hoi. ((lieu va) or (hieu va)) nam thuc vat hang vi cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach lo ((sang xa) OR (lang xa)) hoi. ((lieu va) OR (hieu va)) nam thuc vat hang vi cua viet.
• Adding a wildcard symbol may retrieve word variants: tu sach lo ((sang xa) or (lang xa)) hoi. ((lieu va) or (hieu va)) nam thuc vat hang vi cua viet*.