Perhaps you should try some spelling variations:
ve triet » va trien, su triet
van hanh » van thanh, ban hanh, van anh
thi hanh » thi thanh
cac tuc » cac toc, cac tu, cac tac
va hanh » va thanh, va danh, ban hanh
tu sach » thu sach, su sach, tu cach
hieu ve » hieu va, hieu van
hanh xa » hanh va, hanh ma, hanh xu
te sach » toc sach
lam ve » la ve, lam vu, nam ve
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: ((tu sach) or (te sach)) thi hanh xa hoi. hieu ve cac tuc ((va hanh) OR (van hanh)) lam ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) thi hanh xa hoi. hieu ve cac tuc ((va hanh) OR (van hanh)) lam ve triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (te sach)) thi hanh xa hoi. hieu ve cac tuc ((va hanh) OR (van hanh)) lam ve triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) thi hanh xa hoi. hieu ve cac tuc ((va hanh) OR (van hanh)) lam ve triet*.