Perhaps you should try some spelling variations:
sach vay » sach va, sach hay, sach nay
thanh ve » hanh ve, thanh va, thanh vien
thanh de » hanh de, thanh do, thanh le
hieu van » hieu va, thien van, lieu va
duc van » duc va, duc tan, duc manh
cua tre » cua te, cuu tre, cua triet
nang xa » nang x, lang xa, nang ma
van ha » van hoa, van chat, van hanh
ha duc » ho duc, ha dac, xa duc

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 van ((thanh de) OR (thanh ve)) cua tre~.
• 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 van ((thanh de) OR (thanh ve)) cua tre.
• 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 van ((thanh de) OR (thanh ve)) cua tre".
• Adding a wildcard symbol may retrieve word variants: toc ((sach vay) or (sach y)) nang xa hoi. hieu van ha duc van ((thanh de) OR (thanh ve)) cua tre*.