Perhaps you should try some spelling variations:
thien dan » thien dang, thien danh, thien van
thanh vai » thanh hai, thanh van, thanh tai
tu sach » thu sach, su sach, tu cach
vai cua » dai cua, hai cua, lai cua
qua ban » cua ban, qua quan
dua ban » dia ban, cua ban, mua 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

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. thien dan ca ((dua ban) or (qua ban)) thanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ky sang ma hoa. thien dan ca ((dua ban) OR (qua ban)) thanh vai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (te sach)) ky sang ma hoa. thien dan ca ((dua ban) or (qua ban)) thanh vai cua tre*".