Perhaps you should try some spelling variations:
su sach » so sach, vu sach
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
cac cuu » cap cuu, cac cau, cac chu
cuu ban » cuu van, cua ban, cuu san
danh vi » dinh vi, danh di, danh va
cua tre » cua te, cuu tre, cua triet
y lang » o lang, _ lang, tay lang
ve cac » va cac, vien cac

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 cuu ban ((danh vi) OR (hanh 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 cuu ban ((danh vi) OR (hanh vi)) cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach y lang xa hoi. hieu ve cac cuu ban ((danh vi) OR (hanh vi)) cua tre*.