Perhaps you should try some spelling variations:
dung nang » dun nang, dung dang, dung quang
tham thuc » pham thuc, tam thuc, thai thuc
nham thuc » nhan thuc, nam thuc, nham thu
cua triet » cua viet, su triet, va triet
te sach » toc sach
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
va sinh » va kinh, va tinh, vi sinh
vat cua » mat cua, bat cua, dat cua
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 dung nang ma hoi. hieu ve ((tham thuc) or (nham thuc)) va sinh vat cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach dung nang ma hoi. hieu ve ((tham thuc) OR (nham thuc)) va sinh vat cua triet.
• Adding a wildcard symbol may retrieve word variants: te sach dung nang ma hoi. hieu ve ((tham thuc) or (nham thuc)) va sinh vat cua triet*.