Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
sang tao » hang tai
tuc tuan » duc thuan, quoc tuan, tuc thanh
cua tre » cuu tre, cua triet, dua tren
cac tuc » cac toc, cac tu, cac tac
hieu ve » hieu va, hieu van
tao hoa » bao hoa, tao hoi, tao ho
ky sang » ky nang, ky dang, ky tang
su sach » so sach, vu sach
ve cac » va cac, vien cac
anh vi » hanh vi, anh va, anh ve
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu sach) or (su sach)) ky sang tao hoa. hieu ve cac tuc tuan anh vi ((cua tre) OR (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (su sach)) ky sang tao hoa. hieu ve cac tuc tuan anh vi ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) or (su sach)) ky sang tao hoa. hieu ve cac tuc tuan anh vi ((cua tre) OR (cua te))".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (su sach)) ky sang tao hoa. hieu ve cac tuc tuan anh vi ((cua tre) OR (cua te))*.