Perhaps you should try some spelling variations:
quang dai » quang dam, quang hai, quang ngai
van quang » van quan, tran quang, van tuan
cua thuoc » nha thuoc, cay thuoc, cua nuoc
so sach » so sanh, bo sach, co sach
mai hoi » mai khoi, dai hoi, mai doi
lai hoi » dai hoi, lai hoa, lai roi
hieu ve » hieu va, hieu van
xuc van » duc van, luc van, vuc van
y nang » ky nang, ly nang, v nang
ve cam » ve cham, ve cac, va cam

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: so sach y nang ((mai hoi) or (lai hoi)). hieu ve cam xuc van quang dai cua thuoc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach y nang ((mai hoi) OR (lai hoi)). hieu ve cam xuc van quang dai cua thuoc.
• Adding a wildcard symbol may retrieve word variants: so sach y nang ((mai hoi) or (lai hoi)). hieu ve cam xuc van quang dai cua thuoc*.