Perhaps you should try some spelling variations:
thuc day » thuc dan, thuc vat
hang hai » hoang hai, hang tai, thanh hai
cau treo » cau theo, cau tren, cau triet
su sach » so sach, vu sach
cao hoi » cau hoi, co hoi, cao hoc
thuc va » thuc vat, thuc dan
hai cau » hai chau, hai chu, hai hau
y nang » ly nang, v nang, may nang
va nam » van nam, ha nam, va nay

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