Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
te sach » toc sach
sach ty » sach y, sach tu, sach thu
cao duc » dao duc, cao suc, giao duc
duc gia » quoc gia
cua tuc » cua duc, cua tu, cua thuoc
hang x » hoang xa, chang xu, hang nxb
va cao » va cac, va co, va dao
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: te sach ty ((hang x) or (nang x)) hoi. lieu va cao duc gia thanh dai ((cua te) or (cua tuc))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty ((hang x) OR (nang x)) hoi. lieu va cao duc gia thanh dai ((cua te) OR (cua tuc)).
• Adding a wildcard symbol may retrieve word variants: te sach ty ((hang x) or (nang x)) hoi. lieu va cao duc gia thanh dai ((cua te) or (cua tuc))*.