Perhaps you should try some spelling variations:
danh dai » danh dau, danh sai, vanh dai
vu sach » vu bach, vu khach
danh di » danh du, xanh di, danh dien
cac luc » cau luc, coc luc, cac nuoc
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
nang xa » nang x, lang xa, nang ma
ly nang » ky nang, ly hang, ly vang
su sach » so sach
luc va » duc va, tuc va, loc va
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: ((vu sach) or (su sach)) ly nang xa hoi. hieu ve cac luc va ((danh dai) OR (danh di)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (su sach)) ly nang xa hoi. hieu ve cac luc va ((danh dai) OR (danh di)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu sach) or (su sach)) ly nang xa hoi. hieu ve cac luc va ((danh dai) OR (danh di)) cua tre".
• Adding a wildcard symbol may retrieve word variants: ((vu sach) or (su sach)) ly nang xa hoi. hieu ve cac luc va ((danh dai) OR (danh di)) cua tre*.