Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
dang xay » dang van, van xay
qua hai » qua hoat
hang di » hang doi, hang vi, hang dien
va hang » van hang, va nang, va lang
thuc va » thuc vat, thuc dan, thuc day
co sach » bo sach, cuon sach, hoc sach
qua cai » qua cac, qua ca, quan cau
lang xa » lang ha, lang van
di va » dai va, di vao, doi va

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