Perhaps you should try some spelling variations:
thanh vang » thanh van, thanh hang, thanh hoang
vang cua » mang cua, hang cua, tang cua
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, tu cach
qua ban » cua ban
cua tre » cua te, cuu tre, cua triet
sang ma » tang ma, nang ma, sang tao
ky sang » ky nang, ky dang, ky tang
te sach » toc sach
van ca » van cau, van cua, dan ca

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) OR (te sach)) ky sang ma hoa. hieu van ca ((qua ban) or (qua quan)) thanh vang cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ky sang ma hoa. hieu van ca ((qua ban) OR (qua quan)) thanh vang cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (te sach)) ky sang ma hoa. hieu van ca ((qua ban) or (qua quan)) thanh vang cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (te sach)) ky sang ma hoa. hieu van ca ((qua ban) or (qua quan)) thanh vang cua tre*.