Perhaps you should try some spelling variations:
thanh tai » thanh toan, doanh tai, thanh san
thanh hai » thanh phan, thanh hoa, thanh san
tu sach » thu sach, su sach, te sach
cao duc » dao duc, cao suc, giao duc
sach ty » sach y, sach tu, sach thu
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
ty lang » tay lang, ty xang, ty hang
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: tu sach ty lang xa hoi. hieu ve ((pham duc) or (cao duc)) van ((thanh tai) OR (thanh hai)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty lang xa hoi. hieu ve ((pham duc) OR (cao duc)) van ((thanh tai) OR (thanh hai)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty lang xa hoi. hieu ve ((pham duc) or (cao duc)) van ((thanh tai) OR (thanh hai)) cua te".
• Adding a wildcard symbol may retrieve word variants: tu sach ty lang xa hoi. hieu ve ((pham duc) or (cao duc)) van ((thanh tai) OR (thanh hai)) cua te*.