Perhaps you should try some spelling variations:
thanh dan » thanh san, thanh van, thanh dat
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, tu cach
dan cua » dan ca, ban cua, dai cua
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
da ban » dua ban, day ban, va ban
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 ((da ban) or (dia ban)) thanh dan 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 ((da ban) OR (dia ban)) thanh dan 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 ((da ban) or (dia ban)) thanh dan cua tre*".