Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
ban thanh » ban hanh, ban hang
thanh do » thanh de, thanh pho, thanh hoa
thu sach » thuat sach, thuoc sach, thu hoach
cau luc » cau truc, cau phuc
luc ban » duc ban, cuc ban, luc bat
tu sach » su sach, te sach, tu cach
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
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) OR (thu sach)) ky nang xa hoi. ((hieu ve) or (lieu va)) cau luc ban thanh do cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ky nang xa hoi. ((hieu ve) OR (lieu va)) cau luc ban thanh do cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) ky nang xa hoi. ((hieu ve) or (lieu va)) cau luc ban thanh do cua triet*".