Perhaps you should try some spelling variations:
bao thuc » cao thuoc, am thuc, va thuc
hang dai » hoang dai, hang tai, hang dau
va hang » van hang, va nang, va lang
sach tu » sach thu, cach tu, sach uu
xang xa » lang xa, mang xa, ang xa
hieu ve » hieu van
sach ty » sach y, sach thu, xach tay
thuc va » thuc vat, thuc dan, thuc day
hieu va » lieu va, hieu qua
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: co ((sach ty) OR (sach tu)) xang xa hoi. ((hieu ve) or (hieu va)) bao thuc va hang dai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: co ((sach ty) OR (sach tu)) xang xa hoi. ((hieu ve) OR (hieu va)) bao thuc va hang dai cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "co ((sach ty) OR (sach tu)) xang xa hoi. ((hieu ve) or (hieu va)) bao thuc va hang dai cua tu".
• Adding a wildcard symbol may retrieve word variants: co ((sach ty) OR (sach tu)) xang xa hoi. ((hieu ve) or (hieu va)) bao thuc va hang dai cua tu*.