Perhaps you should try some spelling variations:
thien van » thi van
cau treo » cau theo, cau tren, cau triet
mai khoi » mai khoa, tai khoa, cac khoi
manh hai » lanh hai, minh hai, thanh hai
hai cau » hai chau, hai chu, hai hau
va manh » van manh, va danh, va hanh
su sach » vu sach
mai hoi » dai hoi, lai hoi, mai doi
so sach » so sanh, bo sach, co sach
thu va » thuc va, thue va, tu va
y nang » ky nang, ly nang, v nang

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) y nang ((mai hoi) OR (mai khoi)). thien van nam thu va manh hai cau treo~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (so sach)) y nang ((mai hoi) OR (mai khoi)). thien van nam thu va manh hai cau treo~".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) y nang ((mai hoi) OR (mai khoi)). thien van nam thu va manh hai cau treo*.