Perhaps you should try some spelling variations:
vien cac » vien bach, vien dai, vien da
ban danh » ban doanh, ban hanh, ban dan
su sach » so sach, vu sach
lang xa » lang ha, dang xay, lang van
cuu ban » cuu van, cua ban, cuu san
danh vi » hanh vi, dinh vi, danh di
cua tre » cua te, cuu tre, cua triet
y lang » o lang, _ lang, tay lang
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: su sach y lang xa hoi. hieu ((ve cac) OR (vien cac)) cuu ban danh vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y lang xa hoi. hieu ((ve cac) OR (vien cac)) cuu ban danh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach y lang xa hoi. hieu ((ve cac) OR (vien cac)) cuu ban danh vi cua tre*.