Perhaps you should try some spelling variations:
thanh co » thanh do, thanh ca, thanh ho
cau tren » cu tren, dau tren, ca tren
su sach » so sach, vu sach
vu khac » vu kham, vu khanh, bui khac
hieu ve » hieu va, hieu van
cao duc » dao duc, cao suc, giao duc
duc gia » quoc gia
ve cao » va cao, ve bao, ve cac
co cau » bo cau
5 hoi » o hoi

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) or (vu khac)) ky nang ((5 hoi) or (xa hoi)). hieu ve cao duc gia thanh co cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu khac)) ky nang ((5 hoi) OR (xa hoi)). hieu ve cao duc gia thanh co cau tren.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu khac)) ky nang ((5 hoi) or (xa hoi)). hieu ve cao duc gia thanh co cau tren*.