Perhaps you should try some spelling variations:
thanh cho » thanh pho, thanh cha, thanh chu
cua viet » ca viet, hoa viet, cua vat
thu sach » tu sach, thuat sach, thuoc sach
hieu van » hieu va, thien van, lieu va
dan ban » van ban, can ban, dan bac
cho cua » co cua, chi cua, cho ca
te sach » toc sach
van hac » van hoc, van ha, van hai
dan ba » dan bac, dan ca, dan 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: ((te sach) or (thu sach)) y nang x hoi. hieu van hac ((dan ban) OR (dan ba)) thanh cho cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (thu sach)) y nang x hoi. hieu van hac ((dan ban) OR (dan ba)) thanh cho cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (thu sach)) y nang x hoi. hieu van hac ((dan ban) OR (dan ba)) thanh cho cua viet".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (thu sach)) y nang x hoi. hieu van hac ((dan ban) OR (dan ba)) thanh cho cua viet*.