Perhaps you should try some spelling variations:
so sach » so sanh, bo sach, co sach
nang xa » nang x, lang xa, nang ma
qua cau » quan cau, qua cac, qua ca
truc va » thuc va, thuc vat, trung va
va danh » va dinh, va dan, va hanh
y nang » ky nang, ly nang, v nang
vi va » vai va, vu va, bi va

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 qua cau truc va danh ((vi va) or (vi van)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach y nang xa hoi. hieu qua cau truc va danh ((vi va) OR (vi van)) triet.
• Adding a wildcard symbol may retrieve word variants: so sach y nang xa hoi. hieu qua cau truc va danh ((vi va) or (vi van)) triet*.