Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
va thanh » gia thanh, ban thanh, va tinh
sach ty » sach y, sach tu, sach thu
va hanh » van hanh, va danh, ban hanh
ve chat » va chat, van chat
tu sach » thu sach, su sach, te sach
vu cham » va cham, vu kham, tu cham
nang ma » tang ma, sang ma, nang cao
ty nang » ky nang, ty xang, ty hang
ma hoi » mai hoi, xa hoi, ma hoa

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 ma hoi. hieu ((vu cham) or (ve chat)) duc ((va hanh) OR (va thanh)) mai va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang ma hoi. hieu ((vu cham) OR (ve chat)) duc ((va hanh) OR (va thanh)) mai va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang ma hoi. hieu ((vu cham) or (ve chat)) duc ((va hanh) OR (va thanh)) mai va triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang ma hoi. hieu ((vu cham) or (ve chat)) duc ((va hanh) OR (va thanh)) mai va triet*.