Perhaps you should try some spelling variations:
thanh van » thanh san, thanh toan, thanh phan
ban thanh » ban hanh, ban hang
su sach » so sach, vu sach
cam duc » cam xuc, pham duc, nam duoc
van cua » vang cua, ban cua, dan cua
cao duc » dao duc, cao suc, giao duc
cua tuc » cua duc, cua tu, cua thuoc
sach lo » sach dao, sach doi, sach hoi
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
vang xa » mang xa, ang 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 lo ((vang xa) or (lang xa)) hoi. hieu ve ((cam duc) or (cao duc)) ban thanh van cua tuc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach lo ((vang xa) OR (lang xa)) hoi. hieu ve ((cam duc) OR (cao duc)) ban thanh van cua tuc.
• Adding a wildcard symbol may retrieve word variants: su sach lo ((vang xa) or (lang xa)) hoi. hieu ve ((cam duc) or (cao duc)) ban thanh van cua tuc*.