Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
sinh dai » sinh thai, si dai, sinh vat
sach han » sach tham, sach danh, sach nang
hieu van » hieu va, thien van, lieu va
van cham » van chat, van tham, va cham
han nang » phan nang, van nang, ban nang
truc va » thuc va, thuc vat, trung va
te sach » toc sach
ma hoi » mai hoi, xa hoi, me hoi
tuc va » thuc va, tuc xa, duc va

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 han nang ((ma hoi) or (ma hoa)). hieu van 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 han nang ((ma hoi) OR (ma hoa)). hieu van cham ((tuc va) OR (truc va)) sinh dai cua triet.
• Adding a wildcard symbol may retrieve word variants: te sach han nang ((ma hoi) or (ma hoa)). hieu van cham ((tuc va) or (truc va)) sinh dai cua triet*.