Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
thi hang » thi hanh, thi nang, thi thanh
hanh vai » hanh vi, hanh va, hanh tai
thi hong » thi cong, thi phuong, thi hanh
va hanh » van hanh, va thanh, va danh
ve chat » va chat, van chat
su sach » so sach, vu sach
ve cham » va cham, vu cham, ve chim
tuc va » thuc va, truc va, tuc xa
vai su » va su, van su, lai su

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ((thi hang) or (thi hong)) xa hoi. hieu ((ve cham) OR (ve chat)) tuc va hanh vai su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((thi hang) OR (thi hong)) xa hoi. hieu ((ve cham) OR (ve chat)) tuc va hanh vai su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((thi hang) or (thi hong)) xa hoi. hieu ((ve cham) OR (ve chat)) tuc va hanh vai su triet".
• Adding a wildcard symbol may retrieve word variants: su sach ((thi hang) or (thi hong)) xa hoi. hieu ((ve cham) OR (ve chat)) tuc va hanh vai su triet*.