Perhaps you should try some spelling variations:
thanh phan » thanh pho, thanh san, thanh toan
thanh van » thanh san, thanh toan, thanh nhan
cua viet » ca viet, hoa viet, cua vat
bao thuc » cao thuoc, am thuc, va thuc
hieu van » hieu va, thien van, lieu va
su sach » so sach, vu sach
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang
x hoi » xa hoi, o hoi, x ho

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 v nang x hoi. hieu van ((bao luc) OR (bao thuc)) tan ((thanh van) or (thanh phan)) cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach v nang x hoi. hieu van ((bao luc) OR (bao thuc)) tan ((thanh van) OR (thanh phan)) cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach v nang x hoi. hieu van ((bao luc) OR (bao thuc)) tan ((thanh van) or (thanh phan)) cua viet".
• Adding a wildcard symbol may retrieve word variants: su sach v nang x hoi. hieu van ((bao luc) OR (bao thuc)) tan ((thanh van) or (thanh phan)) cua viet*.