Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
quang xa » quan xa, quang ma, quang va
danh di » danh du, xanh di, danh dien
danh vi » hanh vi, dinh vi, danh va
hieu va » lieu va, hieu qua
sach xu » sach xa, cach xu, mach xu
cac luc » cau luc, coc luc, cac nuoc
sach x » sach xa, sach y, sach 2
luc va » duc va, tuc va, loc va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sach x) or (sach xu)) quang xa hoi. hieu va cac luc va ((danh vi) OR (danh di)) cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach x) OR (sach xu)) quang xa hoi. hieu va cac luc va ((danh vi) OR (danh di)) cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach x) or (sach xu)) quang xa hoi. hieu va cac luc va ((danh vi) OR (danh di)) cua viet".
• Adding a wildcard symbol may retrieve word variants: te ((sach x) or (sach xu)) quang xa hoi. hieu va cac luc va ((danh vi) OR (danh di)) cua viet*.