Perhaps you should try some spelling variations:
cac thuc » cach thuc, cac thu, can thuc
so sach » so sanh, bo sach, co sach
hieu ve » hieu va, hieu van
thuc va » thuc vat, thuc dan, thuc day
va tinh » may tinh
tinh vi » trinh vi, tinh voi, tinh 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
vi su » va su, ve su, ki su

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 thuc va tinh vi su tien~.
• Adding a wildcard symbol may retrieve word variants: so sach y xang x hoi. hieu ve cac thuc va tinh vi su tien*.