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