Perhaps you should try some spelling variations:
so sach » so sanh, bo sach, co sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
cao hoi » cau hoi, co hoi, cao hoc
va pham » van pham, va phat, va phan
va phap » va phat, ban phap
va hanh » van hanh, va thanh, va danh
va tinh » may tinh
cua te » cua tu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ty nang cao hoi. lieu ((va pham) OR (va phap)) duc ((va hanh) or (va tinh)) tri cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ty nang cao hoi. lieu ((va pham) OR (va phap)) duc ((va hanh) OR (va tinh)) tri cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ty nang cao hoi. lieu ((va pham) OR (va phap)) duc ((va hanh) or (va tinh)) tri cua te*".