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