Perhaps you should try some spelling variations:
thanh li » thanh loi, thanh le, nhanh li
va thanh » gia thanh, ban thanh, va tinh
su sach » so sach
vu sach » vu bach, vu khach
hieu ve » hieu va, hieu van
cao duc » dao duc, cao suc, giao duc
ca tren » cau tren, cu tren, la tren
ve cao » va cao, ve bao, ve cac
x hoi » xa hoi, o hoi, 5 hoi
li ca » ly ca

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 sach)) ky nang ((x hoi) OR (x ho)). hieu ve cao duc va thanh li ca tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) ky nang ((x hoi) OR (x ho)). hieu ve cao duc va thanh li ca tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (vu sach)) ky nang ((x hoi) OR (x ho)). hieu ve cao duc va thanh li ca tren".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu sach)) ky nang ((x hoi) OR (x ho)). hieu ve cao duc va thanh li ca tren*.