Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh do » thanh de, thanh pho, thanh hoa
va thanh » gia thanh, ban thanh, va tinh
cau luc » cau truc, cau phuc
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
ky dang » ky nang, ky danh
ky lang » ky nang, ky tang, tay lang
luc va » duc va, tuc va, loc va
do cua » doi cua, co cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ((ky lang) OR (ky dang)) xa hoi. ((hieu ve) or (lieu va)) cau luc va thanh do cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ky lang) OR (ky dang)) xa hoi. ((hieu ve) OR (lieu va)) cau luc va thanh do cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ky lang) OR (ky dang)) xa hoi. ((hieu ve) or (lieu va)) cau luc va thanh do cua triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ky lang) OR (ky dang)) xa hoi. ((hieu ve) or (lieu va)) cau luc va thanh do cua triet*.