Perhaps you should try some spelling variations:
cau treo » cau theo, cau tren, cau triet
doan hai » doanh tai, hoang hai, doan va
cam truc » cau truc, nam truc, lam truoc
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
sach ly » sach y, sach lo, sach ty
truc va » thuc va, thuc vat, trung va
dan hai » dang hai, dan khai, van hai
ly nang » ky nang, ly hang, ly vang
so sach » so sanh, bo sach, co sach
ma hoi » mai hoi, xa hoi, ma hoa
va cam » va cham, va cac, va cao

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 ly nang ma hoi. hieu va cam truc va ((dan hai) OR (doan hai)) cau treo~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ly nang ma hoi. hieu va cam truc va ((dan hai) OR (doan hai)) cau treo".
• Adding a wildcard symbol may retrieve word variants: so sach ly nang ma hoi. hieu va cam truc va ((dan hai) OR (doan hai)) cau treo*.