Perhaps you should try some spelling variations:
su sach » so sach, vu sach
dang xa » dang xay, lang xa, dang ha
hieu va » hieu qua
va tinh » may tinh
tinh vi » trinh vi, tinh voi, tinh va
cua tre » cua te, cuu tre, cua triet
y dang » ky dang, 2 dang, _ dang
luc va » duc va, tuc va, loc va
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 dang xa hoi. ((hieu va) OR (lieu va)) coc luc va tinh vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y dang xa hoi. ((hieu va) OR (lieu va)) coc luc va tinh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach y dang xa hoi. ((hieu va) OR (lieu va)) coc luc va tinh vi cua tre*.