Perhaps you should try some spelling variations:
cau theo » cau thi, cau tao
dao danh » dao doanh, do danh, dao dan
cau treo » cau tren, cau triet, cau trieu
qua thuc » qua phuc, qua tuc, rua thuc
day danh » day manh, dai danh, day dan
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
qua qua » qua quan, qua cua, cua qua
x hoi » xa hoi, o hoi, x ho

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