Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
van hanh » van thanh, ban hanh, van anh
vien cac » vien bach, vien dai, vien da
sang tao » hang tai
tuc van » thuc van, truc van, tuc va
tao hoa » bao hoa, tao hoi, tao ho
ky sang » ky nang, ky dang, ky tang
su sach » so sach, vu sach
cua tre » cua te, cuu tre, cua triet
ve cac » va cac
vi cua » vai cua, di cua

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) OR (vien cac)) tuc van hanh vi cua tre~.
• 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) OR (vien cac)) tuc van hanh vi cua tre.
• 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) OR (vien cac)) tuc van hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (su sach)) ky sang tao hoa. hieu ((ve cac) OR (vien cac)) tuc van hanh vi cua tre*.