Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van thanh » ban thanh, van tuan
thanh vi » hanh vi, thanh va, thanh ve
van nang » van quang, van ban, van dong
dau xuc » dau xac, dau nuoc
dau xua » dau cua, dao xuan, dau luan
tu sach » thu sach, su sach, tu cach
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
te sach » toc sach
vi cua » vai cua, di cua

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) OR (te sach)) van nang xa hoi. hieu va ((dau xuc) or (dau xua)) van thanh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) van nang xa hoi. hieu va ((dau xuc) OR (dau xua)) van thanh vi cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (te sach)) van nang xa hoi. hieu va ((dau xuc) or (dau xua)) van thanh vi cua triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (te sach)) van nang xa hoi. hieu va ((dau xuc) or (dau xua)) van thanh vi cua triet*.