Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
sach vay » sach va, sach hay, sach nay
hieu van » hieu va, thien van, lieu va
va thanh » gia thanh, va tinh, le thanh
nang xa » nang x, lang xa, nang ma
van ha » van hoa, van chat, van hanh
ha duc » ho duc, ha dac, xa duc
le cua » ly 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: toc ((sach vay) or (sach y)) nang xa hoi. hieu van ha duc ((va thanh) OR (ban thanh)) le cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((sach vay) OR (sach y)) nang xa hoi. hieu van ha duc ((va thanh) OR (ban thanh)) le cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc ((sach vay) or (sach y)) nang xa hoi. hieu van ha duc ((va thanh) OR (ban thanh)) le cua te".
• Adding a wildcard symbol may retrieve word variants: toc ((sach vay) or (sach y)) nang xa hoi. hieu van ha duc ((va thanh) OR (ban thanh)) le cua te*.