Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
vien cac » vien bach, vien dai, vien da
tinh via » tinh gia, tinh va, tinh vi
sang tao » hang tai
cua tre » cua te, cua triet, dua tren
va tinh » may tinh
cac xuc » cam xuc, cac nuoc, chat xuc
tu sach » thu sach, su sach, tu cach
tao hoi » tao khoi, tao boi, tay hoi
ky sang » ky nang, ky dang, ky tang
te sach » toc sach
cuu tre » cau tren, cau treo
xuc va » duc va, tuc va, luc va

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 tao hoi. hieu vien cac xuc va tinh via ((cua tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ky sang tao hoi. hieu vien cac xuc va tinh via ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (te sach)) ky sang tao hoi. hieu vien cac xuc va tinh via ((cua tre) OR (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) ky sang tao hoi. hieu vien cac xuc va tinh via ((cua tre) OR (cuu tre))*.