Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, nham thuc
cua triet » cua viet, su triet, va triet
doc sach » hoc sach, toc sach, nuoc sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
hieu va » lieu va, hieu qua
va pham » van pham, va phat, va phap
va hanh » van hanh, va thanh, ban hanh
va danh » va dinh, va dan, dia danh
tai cua » thai cua, tai cuc, tri cua
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc sach ty nang x hoi. hieu va pham thuc ((va hanh) or (va danh)) tai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc sach ty nang x hoi. hieu va pham thuc ((va hanh) OR (va danh)) tai cua triet.
• Adding a wildcard symbol may retrieve word variants: doc sach ty nang x hoi. hieu va pham thuc ((va hanh) or (va danh)) tai cua triet*.