Perhaps you should try some spelling variations:
ve triet » va trien, su triet
sach tai » sach bai, sach tham, sach dao
tai hanh » tai thanh, tai nhanh, thi hanh
vu triet » su triet, va triet, tu triet
hanh lam » thanh lap, hanh kem, hanh va
va hanh » van hanh, va thanh, va danh
tu sach » thu sach, su sach, te sach
hanh xa » hanh va, hanh ma, hanh xu
luc va » duc va, tuc va, loc va
ve cam » ve cham, va cam, ve cai
ve cac » va cac, vien cac

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

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