Perhaps you should try some spelling variations:
va thieu » va thiet, va hieu, va tieu
van hanh » van thanh, ban hanh, van anh
van danh » van doanh, van anh, van manh
sach ky » sac ky, sach y, sach ty
su sach » so sach, vu sach
ve chao » ve chat, ve cho, ve chang
nang xa » nang x, lang xa, nang ma
ve cham » va cham, ve chat, vu cham
va va » va van, va vua, va vai

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky nang xa hoi. hieu ((ve chao) or (ve cham)) xu ((van danh) OR (van hanh)) va va thieu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang xa hoi. hieu ((ve chao) OR (ve cham)) xu ((van danh) OR (van hanh)) va va thieu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang xa hoi. hieu ((ve chao) or (ve cham)) xu ((van danh) OR (van hanh)) va va thieu".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang xa hoi. hieu ((ve chao) or (ve cham)) xu ((van danh) OR (van hanh)) va va thieu*.