Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
trinh han » trinh quan
va trinh » van trinh, va tinh, lap trinh
ky lang » ky dang, ky tang, tay lang
hieu ve » hieu va, hieu van
cac duc » cac du, cao duc, cac dac
han cua » hang cua, nhan cua, than cua
su sac » su sach, su cac, su xac
ve cac » va cac, vien cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sac ((ky lang) or (ky nang)) xa hoi. hieu ve cac duc va trinh han cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ((ky lang) OR (ky nang)) xa hoi. hieu ve cac duc va trinh han cua triet.
• Adding a wildcard symbol may retrieve word variants: su sac ((ky lang) or (ky nang)) xa hoi. hieu ve cac duc va trinh han cua triet*.