Perhaps you should try some spelling variations:
cau treo » cau theo, cau tren, cau triet
chu treo » cu tren, cau tren, chu tri
danh hai » dang hai, lanh hai, manh hai
va danh » va dinh, va dan, va hanh
cam tuc » cam xuc, cam tu, nam thuc
su sach » vu sach
hieu va » lieu va, hieu qua
tang ma » mang may, tang van
so sach » so sanh, bo sach, co sach
ma hoi » mai hoi, xa hoi, ma hoa
tuc va » thuc va, truc va, tuc xa
y tang » ky tang, 6 tang, 7 tang
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: ((su sach) or (so sach)) y tang ma hoi. hieu va cam tuc va danh hai ((chu treo) OR (cau treo))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) y tang ma hoi. hieu va cam tuc va danh hai ((chu treo) OR (cau treo)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (so sach)) y tang ma hoi. hieu va cam tuc va danh hai ((chu treo) OR (cau treo))".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) y tang ma hoi. hieu va cam tuc va danh hai ((chu treo) OR (cau treo))*.