Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
va thanh » gia thanh, va tinh, le thanh
so sach » so sanh, bo sach, co sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
cao duc » dao duc, cao suc, giao duc
di cua » dai cua, doi cua, de cua
cua te » cua tu

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) or (lieu va)) cao duc ((va thanh) OR (ban thanh)) di cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ty nang xa hoi. ((hieu ve) OR (lieu va)) cao duc ((va thanh) OR (ban thanh)) di cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ty nang xa hoi. ((hieu ve) or (lieu va)) cao duc ((va thanh) OR (ban thanh)) di cua te".
• Adding a wildcard symbol may retrieve word variants: so sach ty nang xa hoi. ((hieu ve) or (lieu va)) cao duc ((va thanh) OR (ban thanh)) di cua te*.