Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van hanh » van thanh, ban hanh, van ban
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
van anh » van thanh, tuan anh, van minh
tu san » thu san, tu ban, tu can
san ky » sang ky, van ky, dan ky
va cam » va cham, va cao, va cai
di cua » dai cua, doi cua, de cua

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu san ky lang xa hoi. lieu ((va cam) OR (va cac)) luc ((van hanh) OR (van anh)) di cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu san ky lang xa hoi. lieu ((va cam) or (va cac)) luc ((van hanh) OR (van anh)) di cua triet~".
• Adding a wildcard symbol may retrieve word variants: tu san ky lang xa hoi. lieu ((va cam) or (va cac)) luc ((van hanh) OR (van anh)) di cua triet*.