Perhaps you should try some spelling variations:
bach dan » bach dang, bac dan, bach van
hieu van » hieu va, thien van, lieu va
van cham » van chat, van tham, va cham
lang xa » lang ha, dang xay, lang van
soc ban » hoc ban, coc ban, so ban
su hien » su kien, su tien, thu hien
anh vi » anh va, anh ve, anh vu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((bach dan) or (cach mang)) lang xa hoi. hieu van cham soc ban ((anh vi) OR (hanh vi)) su hien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((bach dan) OR (cach mang)) lang xa hoi. hieu van cham soc ban ((anh vi) OR (hanh vi)) su hien*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((bach dan) or (cach mang)) lang xa hoi. hieu van cham soc ban ((anh vi) OR (hanh vi)) su hien*".