Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
vien cac » vien bach, vien dai, vien da
hanh vai » hanh vi, hanh va, hanh tai
van hanh » van thanh, ban hanh, van anh
vai cua » dai cua, hai cua, lai cua
bo van » vo van, so van, do van
sac ky » sai ky
ve bac » ve bao, ve cac, ve ban
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sac ky) OR (cac ky)) nang x hoi. hieu ((ve bac) or (vien cac)) bo van hanh vai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sac ky) OR (cac ky)) nang x hoi. hieu ((ve bac) OR (vien cac)) bo van hanh vai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sac ky) OR (cac ky)) nang x hoi. hieu ((ve bac) or (vien cac)) bo van hanh vai cua triet".
• Adding a wildcard symbol may retrieve word variants: tu ((sac ky) OR (cac ky)) nang x hoi. hieu ((ve bac) or (vien cac)) bo van hanh vai cua triet*.