Perhaps you should try some spelling variations:
thien van » thi van
cua triet » cua viet, va triet
su triet » su viet, su tien, ve triet
ban hanh » ban hang
hanh ca » hanh cac, hanh cat, hanh cua
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
cau tuc » cau truc, cau tu, cau phuc
cau luc » cau truc, cau phuc
so sac » so sach, so dac
sac ky » cac ky, sai ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sac ky lang xa hoi. thien van ((cau tuc) OR (cau luc)) ban hanh ca ((cua triet) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sac ky lang xa hoi. thien van ((cau tuc) OR (cau luc)) ban hanh ca ((cua triet) OR (su triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sac ky lang xa hoi. thien van ((cau tuc) OR (cau luc)) ban hanh ca ((cua triet) or (su triet))".
• Adding a wildcard symbol may retrieve word variants: so sac ky lang xa hoi. thien van ((cau tuc) OR (cau luc)) ban hanh ca ((cua triet) or (su triet))*.