Perhaps you should try some spelling variations:
ve triet » va trien, su triet
hanh lam » thanh lap, hanh kem, hanh va
van hanh » van thanh, ban hanh, van anh
tuc van » thuc van, truc van, tuc va
tu sach » thu sach, su sach, te sach
ve cac » va cac, vien cac
ve cam » ve cham, va cam, ve cai
lam ve » la ve, lam vu, nam ve

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 ((thi hanh) or (thi thanh)) xa hoi. hieu ((ve cam) OR (ve cac)) tuc van hanh lam ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((thi hanh) OR (thi thanh)) xa hoi. hieu ((ve cam) OR (ve cac)) tuc van hanh lam ve triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((thi hanh) or (thi thanh)) xa hoi. hieu ((ve cam) OR (ve cac)) tuc van hanh lam ve triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ((thi hanh) or (thi thanh)) xa hoi. hieu ((ve cam) OR (ve cac)) tuc van hanh lam ve triet*.