Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
van thanh » ban thanh, van tuan
tu sach » thu sach, su sach, te sach
hai cua » thai cua, dai cua, hoi cua
cao suc » cao su, cao duc
hieu ve » hieu va, hieu van
ly vang » ly hang, ly van, ly quang
ly nang » ky nang, ly hang, ly quang
cua tu » cua tuc, cua su, cua cu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ((ly nang) or (ly vang)) xa hoi. hieu ve ((pham duc) or (cao suc)) van thanh hai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ly nang) OR (ly vang)) xa hoi. hieu ve ((pham duc) OR (cao suc)) van thanh hai cua tu.
• Adding a wildcard symbol may retrieve word variants: tu sach ((ly nang) or (ly vang)) xa hoi. hieu ve ((pham duc) or (cao suc)) van thanh hai cua tu*.