Perhaps you should try some spelling variations:
thanh than » thanh thanh, thanh thang, thanh toan
cua triet » cua viet, su triet, va triet
van thanh » ban thanh, van tuan
hieu van » hieu va, thien van, lieu va
sach ty » sach y, sach tu, sach thu
van bac » van ban, van bao, van hac
xuc van » duc van, luc van, vuc van
cua tre » cua te, cuu tre, dua tren
su sach » so sach, vu sach
ang xa » lang xa, mang xa, dang xay

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ty ((ang xa) or (mang may)) hoi. hieu van bac xuc van thanh than ((cua tre) OR (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty ((ang xa) OR (mang may)) hoi. hieu van bac xuc van thanh than ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty ((ang xa) or (mang may)) hoi. hieu van bac xuc van thanh than ((cua tre) OR (cua triet))".
• Adding a wildcard symbol may retrieve word variants: su sach ty ((ang xa) or (mang may)) hoi. hieu van bac xuc van thanh than ((cua tre) OR (cua triet))*.