Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
hieu van » hieu va, thien van, lieu va
dua tren » dung tren
thanh ve » hanh ve, thanh va, thanh vien
xuc ban » duc ban, cuc ban, quoc ban
van cam » van nam, van lam, van cau
sach ky » sac ky, sach y, sach kem
dang xa » dang xay, lang xa, dang ha
sach ty » sach y, sach tu, sach thu
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: su ((sach ky) OR (sach ty)) dang xa hoi. hieu van cam xuc ban thanh ve ((dua tren) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ky) OR (sach ty)) dang xa hoi. hieu van cam xuc ban thanh ve ((dua tren) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ky) OR (sach ty)) dang xa hoi. hieu van cam xuc ban thanh ve ((dua tren) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: su ((sach ky) OR (sach ty)) dang xa hoi. hieu van cam xuc ban thanh ve ((dua tren) or (cua te))*.