Perhaps you should try some spelling variations:
van chat » cao chat
sach ty » sach y, sach tu, sach thu
va danh » va dinh, va dan, dia danh
va hanh » van hanh, va thanh, ban hanh
su sach » so sach, vu sach
ve chat » va chat
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
va va » va van, va vua, va vai
thiet » thieu

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 ty nang xa hoi. hieu ((ve chat) or (van chat)) xuc ((va hanh) OR (va danh)) va va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang xa hoi. hieu ((ve chat) OR (van chat)) xuc ((va hanh) OR (va danh)) va va thiet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty nang xa hoi. hieu ((ve chat) or (van chat)) xuc ((va hanh) OR (va danh)) va va thiet".
• Adding a wildcard symbol may retrieve word variants: su sach ty nang xa hoi. hieu ((ve chat) or (van chat)) xuc ((va hanh) OR (va danh)) va va thiet*.