Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
sach phan » sach han, mach phan, sach phat
phan nang » phap nang, phan dang, phan cang
sinh dai » sinh thai, si dai, sinh vat
truc va » thuc va, thuc vat, trung va
te sach » toc sach
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
tuc va » thuc va, tuc xa, duc va
ma hoi » mai hoi, xa hoi, me hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach phan nang ((ma hoi) or (ma hoa)). hieu ve cham ((tuc va) or (truc va)) sinh dai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach phan nang ((ma hoi) OR (ma hoa)). hieu ve cham ((tuc va) OR (truc va)) sinh dai cua triet.
• Adding a wildcard symbol may retrieve word variants: te sach phan nang ((ma hoi) or (ma hoa)). hieu ve cham ((tuc va) or (truc va)) sinh dai cua triet*.