Perhaps you should try some spelling variations:
quan thuc » luan thuc, qua thuc, quan chuc
cau treo » cau theo, cau tren, cau triet
su triet » su viet, su tien, ve triet
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
thuc va » thuc vat, thuc dan, thuc day
va danh » va dinh, va dan, va hanh
danh va » doanh va, hanh va, anh va
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 quan thuc va danh va ((cau treo) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang x hoi. hieu qua quan thuc va danh va ((cau treo) OR (su triet)).
• Adding a wildcard symbol may retrieve word variants: su sach ky nang x hoi. hieu qua quan thuc va danh va ((cau treo) or (su triet))*.