Perhaps you should try some spelling variations:
cac thuc » cach thuc, cac thu, can thuc
vat tinh » sat tinh, vat sinh, hoat tinh
so sanh » do sanh
hieu ve » hieu va, hieu van
tinh ki » trinh ki, tinh vi, tinh kien
su tien » su kien, su hien, tu tieng
sanh y » sinh y, anh y, hanh y
y xang » ty xang
xang x » nang x
ve cac » va cac, vien cac
x hoi » xa hoi, o hoi, x ho
ki su » ky 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 sanh y xang x hoi. hieu ve cac thuc vat tinh ki su tien~.
• Adding a wildcard symbol may retrieve word variants: so sanh y xang x hoi. hieu ve cac thuc vat tinh ki su tien*.