Perhaps you should try some spelling variations:
thuc day » thuc dan, thuc vat
day danh » day manh, dai danh, dao danh
cau treo » cau tren, cau triet, cau trieu
cau theo » cau thi, cau tao
su sach » so sach, vu sach
qua qua » qua quan, qua cua, qua quang
cua qua » cua quan, cua rua, cuu qua
danh va » doanh va, hanh va, anh va
y nang » ky nang, ly nang, v nang
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 y nang x hoi. hieu ((qua qua) OR (cua qua)) thuc day danh va ((cau treo) or (cau theo))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang x hoi. hieu ((qua qua) OR (cua qua)) thuc day danh va ((cau treo) OR (cau theo)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang x hoi. hieu ((qua qua) OR (cua qua)) thuc day danh va ((cau treo) or (cau theo))".
• Adding a wildcard symbol may retrieve word variants: su sach y nang x hoi. hieu ((qua qua) OR (cua qua)) thuc day danh va ((cau treo) or (cau theo))*.