Perhaps you should try some spelling variations:
cau theo » cau thi, cau tao
hanh hai » thanh hai, nhanh hai, hang hai
thu nang » thi nang, thu hang, thu bang
van hanh » van thanh, ban hanh, van anh
hai cau » hai chau, hai chu, hai hau
xuc van » duc van, luc van, vuc van
su sach » vu sach
van lam » van nam
nang xa » nang x, lang xa, nang ma
so sach » so sanh, bo sach, co sach
van cam » van nam, van cau, van dam

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 (so sach)) thu nang xa hoi. hieu ((van cam) OR (van lam)) xuc van hanh hai cau theo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) thu nang xa hoi. hieu ((van cam) OR (van lam)) xuc van hanh hai cau theo.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (so sach)) thu nang xa hoi. hieu ((van cam) OR (van lam)) xuc van hanh hai cau theo".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) thu nang xa hoi. hieu ((van cam) OR (van lam)) xuc van hanh hai cau theo*.