Perhaps you should try some spelling variations:
van cham » van chat, va cham, van pham
van tham » van thanh, van tuan, van chat
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
va danh » va dinh, va hanh, dia danh
dai hoa » dai khoa, dai hoc, dai hoi
y nang » ky nang, ly nang, v nang
va dan » ca dan, va dao, va dau

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 y nang xa hoi. hieu ((van cham) OR (van tham)) soc ((va danh) or (va dan)) dai hoa viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang xa hoi. hieu ((van cham) OR (van tham)) soc ((va danh) OR (va dan)) dai hoa viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang xa hoi. hieu ((van cham) OR (van tham)) soc ((va danh) or (va dan)) dai hoa viet".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang xa hoi. hieu ((van cham) OR (van tham)) soc ((va danh) or (va dan)) dai hoa viet*.