Perhaps you should try some spelling variations:
van nang » van quang, van ban, van dong
su triet » su viet, su tien, ve triet
so sach » so sanh, bo sach, co sach
nang xa » nang x, lang xa, nang ma
ve cham » va cham, ve chat, vu cham
va nang » da nang, cam nang, kha nang
y nang » ky nang, ly nang, v nang
va cam » va cham, va cac, va cao

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