Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, nham thuc
nham thu » nham thuc, nam thu, pham thu
hanh vai » hanh vi, hanh va, hanh tai
va triet » va thiet, va trien, ve triet
tu sach » thu sach, su sach, te sach
sach ki » sach kinh, sach bai, sach kem
ki nang » ky nang
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
va hanh » van hanh, va thanh, va danh
vai va » mai va, dai va, hai va

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ki nang xa hoi. hieu ve ((pham thuc) or (nham thu)) va hanh vai va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ki nang xa hoi. hieu ve ((pham thuc) OR (nham thu)) va hanh vai va triet.
• Adding a wildcard symbol may retrieve word variants: tu sach ki nang xa hoi. hieu ve ((pham thuc) or (nham thu)) va hanh vai va triet*.