Perhaps you should try some spelling variations:
suu triet » su triet, cuu thiet, cua triet
tham thuc » nham thuc, pham thuc, tam thuc
vu sach » vu bach, su sach, vu khach
nang ma » tang ma, nang cao, mang may
dao suu » dao huu, da suu
va lanh » va lang, va danh, va hanh
sang ma » tang ma, sang tao, mang may
thuc va » thuc vat, thuc dan, thuc day
hieu ve » hieu va, hieu van
ve tham » va tham, ve cham, vi tham

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

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