Perhaps you should try some spelling variations:
bach van » bach dan, cach van, bach dang
van nang » van quang, van ban, van dong
thuc van » thuc vat, thuc dan, thuc va
su triet » su tien, ve triet
tu bach » vu bach, tu cach, tu bac
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
duc van » duc va, duc tan, duc manh
su viet » so viet

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 van nang xa hoi. hieu ve cham ((thuc van) or (duc van)) hanh vi ((su triet) or (su viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu bach van nang xa hoi. hieu ve cham ((thuc van) OR (duc van)) hanh vi ((su triet) OR (su viet)).
• Adding a wildcard symbol may retrieve word variants: tu bach van nang xa hoi. hieu ve cham ((thuc van) or (duc van)) hanh vi ((su triet) or (su viet))*.