Perhaps you should try some spelling variations:
quans vi » quan vi, quan li, quan va
su sach » so sach, vu sach
cau tuc » cau truc, cau tu, cau luc
tuc van » thuc van, truc van, tuc va
tuan vi » quan vi, luan vi, tuan tai
cuu tre » cau tren, cau treo
cua tre » cua te, cua triet, dua tren
y nang » ky nang, ly nang, v nang
va cau » van cau, va cac, va dau
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. lieu va cau tuc van ((tuan vi) or (quans vi)) ((cuu tre) OR (cua tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang x hoi. lieu va cau tuc van ((tuan vi) OR (quans vi)) ((cuu tre) OR (cua tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang x hoi. lieu va cau tuc van ((tuan vi) or (quans vi)) ((cuu tre) OR (cua tre))".
• Adding a wildcard symbol may retrieve word variants: su sach y nang x hoi. lieu va cau tuc van ((tuan vi) or (quans vi)) ((cuu tre) OR (cua tre))*.