Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hang cua » mang cua, hang ca, huong cua
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu ve » hieu van
hieu va » lieu va, hieu qua
cua cua » cua chua, ca cua, qua cua
luc 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: vu sach ky nang xa hoi. ((hieu ve) OR (hieu va)) cam ((luc va) or (duc va)) hang cua cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky nang xa hoi. ((hieu ve) OR (hieu va)) cam ((luc va) OR (duc va)) hang cua cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ky nang xa hoi. ((hieu ve) OR (hieu va)) cam ((luc va) or (duc va)) hang cua cua triet".
• Adding a wildcard symbol may retrieve word variants: vu sach ky nang xa hoi. ((hieu ve) OR (hieu va)) cam ((luc va) or (duc va)) hang cua cua triet*.