Perhaps you should try some spelling variations:
thuoc ban » thuoc tan, thuoc dang, thu ban
cau theo » cau thi, cau tao
cau treo » cau tren, cau triet, cau trieu
thanh ve » hanh ve, thanh va, thanh vien
thuc ban » thuc dan, thu ban, thuc van
te sach » toc sach
sach vu » sach va, sach tu, sach uu
hieu ve » hieu va, hieu van
vu nang » vuc nang, va nang, vu dang
ve hoc » te hoc, va hoc, vi hoc
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: te sach vu nang x hoi. hieu ve hoc ((thuc ban) OR (thuoc ban)) thanh ve ((cau treo) or (cau theo))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach vu nang x hoi. hieu ve hoc ((thuc ban) OR (thuoc ban)) thanh ve ((cau treo) OR (cau theo)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach vu nang x hoi. hieu ve hoc ((thuc ban) OR (thuoc ban)) thanh ve ((cau treo) or (cau theo))".
• Adding a wildcard symbol may retrieve word variants: te sach vu nang x hoi. hieu ve hoc ((thuc ban) OR (thuoc ban)) thanh ve ((cau treo) or (cau theo))*.