Perhaps you should try some spelling variations:
cac truc » cau truc, cac tru, cac trung
thanh vi » hanh vi, thanh ve, nhanh vi
thanh va » thanh van, hanh va, thanh ha
so sach » so sanh, bo sach, co sach
hieu ve » hieu va, hieu van
truc va » thuc va, thuc vat, trung va
su tien » su kien, su hien, tu tieng
y xang » ty xang
xang x » nang x
ve cac » va cac, vien cac
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: so sach y xang x hoi. hieu ve cac truc va ((thanh vi) or (thanh va)) su tien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach y xang x hoi. hieu ve cac truc va ((thanh vi) OR (thanh va)) su tien.
• Adding a wildcard symbol may retrieve word variants: so sach y xang x hoi. hieu ve cac truc va ((thanh vi) or (thanh va)) su tien*.