Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cau cua » cau qua, ca cua, cu cua
dao cau » dat cau, da cau, tao cau
thuc va » thuc vat, thuc dan, thuc day
sach va » sach xa, sach ha, sach dao
hieu va » lieu va, hieu qua
tu sach » thu sach, su sach, te sach
va nang » van nang, da nang, cam nang
tuc va » truc va, tuc xa, duc va
me hoi » le hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach va nang ((me hoi) or (ma hoa)). hieu va cac ((tuc va) OR (thuc va)) dao cau cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach va nang ((me hoi) OR (ma hoa)). hieu va cac ((tuc va) OR (thuc va)) dao cau cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach va nang ((me hoi) or (ma hoa)). hieu va cac ((tuc va) OR (thuc va)) dao cau cua triet*".