Perhaps you should try some spelling variations:
cau treo » cau theo, cau tren, cau triet
danh hai » dang hai, lanh hai, manh hai
mai khoi » mai khoa, tai khoa, cac khoi
hai cau » hai chau, hai chu, hai hau
thuc va » thuc vat, thuc dan, thuc day
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
tuc va » truc va, tuc xa, duc va
ma hoi » mai hoi, xa hoi, ma hoa
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: so sach ky nang ((ma hoi) or (mai khoi)). hieu va nam ((tuc va) OR (thuc va)) danh hai cau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky nang ((ma hoi) OR (mai khoi)). hieu va nam ((tuc va) OR (thuc va)) danh hai cau treo.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ky nang ((ma hoi) or (mai khoi)). hieu va nam ((tuc va) OR (thuc va)) danh hai cau treo".
• Adding a wildcard symbol may retrieve word variants: so sach ky nang ((ma hoi) or (mai khoi)). hieu va nam ((tuc va) OR (thuc va)) danh hai cau treo*.