Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
cau treo » cau theo, cau tren, cau triet
van hang » van khang, van hoang, van thang
hang hai » hoang hai, hang tai, thanh hai
hieu vu » hieu va, hieu ve, hieu su
vu kham » vu khanh
kham lo » pham lao
hai cau » hai chau, hai chu, hai hau
ma hoi » mai hoi, xa hoi, me hoi
lo van » le van, vo van, so van

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu hoach) or (thuoc sach)) ky nang ((ma hoi) or (ma hoa)). hieu vu kham lo van hang hai cau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu hoach) OR (thuoc sach)) ky nang ((ma hoi) OR (ma hoa)). hieu vu kham lo van hang hai cau treo.
• Adding a wildcard symbol may retrieve word variants: ((thu hoach) or (thuoc sach)) ky nang ((ma hoi) or (ma hoa)). hieu vu kham lo van hang hai cau treo*.