Perhaps you should try some spelling variations:
cau treo » cau theo, cau tren, cau triet
hai cau » hai chau, hai chu, hai hau
dan hai » doan hai, dang hai, dan khai
cam tuc » cam xuc, cam tu, nam thuc
su sach » so sach, vu sach
hieu va » lieu va
ky tang » ky nang, ky dang, kho tang
y tang » 6 tang, 7 tang, 5 tang
ma hoi » mai hoi, xa hoi, ma hoa
tuc va » thuc va, truc va, tuc xa
va dan » ca dan, va dao, va dau

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 tang) OR (ky tang)) ma hoi. ((hieu va) or (hieu qua)) cam tuc va dan hai cau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((y tang) OR (ky tang)) ma hoi. ((hieu va) OR (hieu qua)) cam tuc va dan hai cau treo.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((y tang) OR (ky tang)) ma hoi. ((hieu va) or (hieu qua)) cam tuc va dan hai cau treo".
• Adding a wildcard symbol may retrieve word variants: su sach ((y tang) OR (ky tang)) ma hoi. ((hieu va) or (hieu qua)) cam tuc va dan hai cau treo*.