Perhaps you should try some spelling variations:
sach tham » sach nha
tham nang » nham nang, tham lang, tham nhung
sinh thai » dinh thi
cham thuc » nham thuc, pham thuc, tham thuc
va triet » va thiet, va trien, ve triet
van cham » van chat, van tham, va cham
hieu van » hieu va, thien van, lieu va
mai hoi » mai khoi, dai hoi, lai hoi
thuc va » thuc vat, thuc dan, thuc day
va sinh » va kinh, va tinh, vi sinh
thai va » thai van
te sach » toc sach
ma hoi » xa hoi, ma hoa, 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 tham nang ((ma hoi) or (mai hoi)). hieu van cham thuc va sinh thai va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach tham nang ((ma hoi) OR (mai hoi)). hieu van cham thuc va sinh thai va triet.
• Adding a wildcard symbol may retrieve word variants: te sach tham nang ((ma hoi) or (mai hoi)). hieu van cham thuc va sinh thai va triet*.