Perhaps you should try some spelling variations:
tham thuc » nham thuc, tam thuc, thai thuc
pham thuc » phap thuc, pham chuc, nham thuc
dao tang » dao trang, cao tang, dam tang
va triet » va thiet, va trien, ve triet
su sach » so sach, vu sach
tang xa » trang xa, tang ma, lang xa
hieu ve » hieu va, hieu van
va lanh » va lang, va danh, va hanh
dao va » dao van, tao va, do va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sach dao tang xa hoi. hieu ve ((tham thuc) or (pham thuc)) va lanh dao va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach dao tang xa hoi. hieu ve ((tham thuc) OR (pham thuc)) va lanh dao va triet.
• Adding a wildcard symbol may retrieve word variants: su sach dao tang xa hoi. hieu ve ((tham thuc) or (pham thuc)) va lanh dao va triet*.