Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
sach thi » sach tai, sach thieu, sach tham
sach thu » sach thue, sach thieu, sach tham
va triet » va thiet, va trien, ve triet
hanh xa » hanh va, hanh ma, hanh xu
hieu ve » hieu va, hieu van
cam tuc » cam tu, nam thuc, dam thuc
san va » san van, ban va, dan va

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 thi) or (sach thu)) hanh xa hoi. hieu ve ((cam tuc) or (cam xuc)) van thanh san va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach thi) OR (sach thu)) hanh xa hoi. hieu ve ((cam tuc) OR (cam xuc)) van thanh san va triet.
• Adding a wildcard symbol may retrieve word variants: tu ((sach thi) or (sach thu)) hanh xa hoi. hieu ve ((cam tuc) or (cam xuc)) van thanh san va triet*.