Perhaps you should try some spelling variations:
sach tham » sach nha
tham lang » nham nang, pham hang, thai bang
cham thuc » nham thuc, pham thuc, pham thuoc
tham thuc » nham thuc, pham thuc, tam thuc
sinh thai » dinh thi
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
thai cua » than cua, tai cuc, tri cua
te sach » toc sach
lang ma » lang mai, lang man, lang ha
va sinh » va kinh, va tinh, vi sinh
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) OR (tham thuc)) va sinh thai cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach tham lang ma hoi. hieu van ((cham thuc) OR (tham thuc)) va sinh thai cua triet".
• Adding a wildcard symbol may retrieve word variants: te sach tham lang ma hoi. hieu van ((cham thuc) OR (tham thuc)) va sinh thai cua triet*.