Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
va thanh » gia thanh, ban thanh, va tinh
ban hanh » ban hang
so sach » so sanh, bo sach, co sach
sach ty » sach y, sach tu, sach thu
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
ve cac » vien cac
vi va » vi van, vai va, vu 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 ty nang xa hoi. hieu ((ve cac) OR (va cac)) xuc ((ban hanh) or (va thanh)) vi va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ty nang xa hoi. hieu ((ve cac) OR (va cac)) xuc ((ban hanh) OR (va thanh)) vi va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ty nang xa hoi. hieu ((ve cac) OR (va cac)) xuc ((ban hanh) or (va thanh)) vi va triet".
• Adding a wildcard symbol may retrieve word variants: so sach ty nang xa hoi. hieu ((ve cac) OR (va cac)) xuc ((ban hanh) or (va thanh)) vi va triet*.