Perhaps you should try some spelling variations:
lang xa » lang ha, dang xay, lang van
qua cao » qua ca, qua cai, qua co
qua cac » cua cac
thuc va » thuc vat, thuc dan, thuc day
va hang » van hang, va nang, va lang
so sach » so sanh, bo sach, co sach
y lang » o lang, _ lang, tay lang
dai va » mai va
di va » di vao, doi va, di vat

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 y lang xa hoi. hieu ((qua cao) or (qua cac)) thuc va hang ((di va) OR (dai va)) trien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach y lang xa hoi. hieu ((qua cao) OR (qua cac)) thuc va hang ((di va) OR (dai va)) trien*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach y lang xa hoi. hieu ((qua cao) or (qua cac)) thuc va hang ((di va) OR (dai va)) trien*".