Perhaps you should try some spelling variations:
van quang » van quan, tran quang, van tuan
quang dam » quang nam, quang lam, quang dai
cua quoc » cua thuoc
cua nuoc » cua nguoi, cua thuoc, nha nuoc
xuc van » duc van, luc van, vuc van
su sach » so sach, vu sach
lai hoi » dai hoi, lai hoa, lai roi
mai hoi » mai khoi, dai hoi, mai doi
hieu ve » hieu va, hieu van
ve cam » ve cham, ve cac, va cam
y nang » ky nang, ly nang, v nang

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 y nang ((mai hoi) or (lai hoi)). hieu ve cam xuc van quang dam ((cua nuoc) OR (cua quoc))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang ((mai hoi) OR (lai hoi)). hieu ve cam xuc van quang dam ((cua nuoc) OR (cua quoc)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang ((mai hoi) or (lai hoi)). hieu ve cam xuc van quang dam ((cua nuoc) OR (cua quoc))".
• Adding a wildcard symbol may retrieve word variants: su sach y nang ((mai hoi) or (lai hoi)). hieu ve cam xuc van quang dam ((cua nuoc) OR (cua quoc))*.