Perhaps you should try some spelling variations:
cham thuc » nham thuc, pham thuc, tham thuc
sach tham » sach nha
tham lang » nham nang, pham hang, thai bang
cua triet » cua viet, su triet
sinh thai » dinh thi
va triet » va thiet, va trien, ve triet
van cham » van chat, van tham, va cham
hieu van » hieu va, thien van, lieu va
thuc va » thuc vat, thuc dan, thuc day
va sinh » va kinh, va tinh, vi sinh
lang ma » lang mai, lang man, lang ha
te sach » toc sach
ma hoi » mai hoi, xa hoi, ma hoa

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 lang ma hoi. hieu van cham thuc va sinh thai ((cua triet) OR (va triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach tham lang ma hoi. hieu van cham thuc va sinh thai ((cua triet) OR (va triet))".
• Adding a wildcard symbol may retrieve word variants: te sach tham lang ma hoi. hieu van cham thuc va sinh thai ((cua triet) OR (va triet))*.