Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
dang xay » dang van, van xay
sach tai » sach bai, sach tham, sach dao
qua cai » qua hai, qua cac, qua ca
hang di » hang doi, hang vi, hang dien
va hang » van hang, va nang, va lang
thuc va » thuc vat, thuc dan, thuc day
so sach » so sanh, bo sach, co sach
lang xa » lang ha, lang van
qua cao » qua cac, qua ca, qua co
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: so sach tai ((lang xa) or (dang xay)) hoi. hieu ((qua cao) OR (qua cai)) thuc va hang di va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach tai ((lang xa) OR (dang xay)) hoi. hieu ((qua cao) OR (qua cai)) thuc va hang di va triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach tai ((lang xa) or (dang xay)) hoi. hieu ((qua cao) OR (qua cai)) thuc va hang di va triet*".