Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
hanh dam » thanh dam, hanh lam, hanh nam
va hanh » van hanh, va thanh, va danh
ve cham » va cham, ve chat, vu cham
tu sach » thu sach, su sach, te sach
ve cam » ve cac, va cam, ve cai
tuc va » thuc va, truc va, tuc xa
dam va » dam van, nam va, dam ha

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 cham)) tuc va hanh dam va 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 cham)) tuc va hanh dam va 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 cham)) tuc va hanh dam va triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ((thi hanh) or (thi thanh)) xa hoi. hieu ((ve cam) OR (ve cham)) tuc va hanh dam va triet*.