Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
hang dai » hoang dai, hang tai, hang dau
thuc van » thuc vat, thuc dan, thuc hanh
thuc va » thuc vat, thuc dan, thuc day
so sach » so sanh, bo sach, co sach
hieu va » lieu va, hieu qua
y long » sy long, _ long, ly luong
ha hoi » hoa hoi, ha noi, xa hoi
o long » bo long, do long, vo long
dai va » mai va
va cam » va cham, va cac, va cao

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 long) OR (o long)) ha hoi. hieu va cam ((thuc van) or (thuc va)) hang dai va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ((y long) OR (o long)) ha hoi. hieu va cam ((thuc van) OR (thuc va)) hang dai va triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ((y long) OR (o long)) ha hoi. hieu va cam ((thuc van) or (thuc va)) hang dai va triet*".