Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
hanh noi » ha noi, hanh vi, nang noi
pham duy » pham duc
cham duc » pham duc, cham soc, phan duc
va hanh » van hanh, va thanh, va danh
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
ty hang » ly hang, ty xang, thi hang
ty nang » ky nang, ty xang, ly nang
noi va » hoi 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 ((ty nang) OR (ty hang)) xa hoi. hieu ve ((cham duc) or (pham duy)) va hanh noi va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ty nang) OR (ty hang)) xa hoi. hieu ve ((cham duc) OR (pham duy)) va hanh noi va triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ty nang) OR (ty hang)) xa hoi. hieu ve ((cham duc) or (pham duy)) va hanh noi va triet*".