Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
hanh mai » hanh ma, hanh mau, hanh may
thu sach » thuat sach, thuoc sach, thu hoach
va hanh » van hanh, va thanh, va danh
ve chat » va chat, van chat
vu cham » va cham, vu kham, tu cham
tu sach » su sach, te sach, tu cach
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) OR (thu sach)) ty nang ma hoi. hieu ((vu cham) or (ve chat)) duc va hanh mai va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ty nang ma hoi. hieu ((vu cham) OR (ve chat)) duc va hanh mai va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) ty nang ma hoi. hieu ((vu cham) or (ve chat)) duc va hanh mai va triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (thu sach)) ty nang ma hoi. hieu ((vu cham) or (ve chat)) duc va hanh mai va triet*.