Perhaps you should try some spelling variations:
thien van » thi van
cau treo » cau theo, cau tren, cau triet
cac thuc » cach thuc, can thuc, cay thuc
manh hai » lanh hai, minh hai, thanh hai
hai cau » hai chau, hai chu, hai hau
va manh » van manh, va danh, va hanh
cac thu » cach thuc, cac thoi
su sach » so sach, vu sach
nang xa » lang xa, nang ma, mang xa
sach ky » sac ky, sach y, sach ty

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