Perhaps you should try some spelling variations:
hoc thuc » hoc huu
doc thuc » do thuc, hoc thuoc, dan thuc
tinh va » tich va, trinh van, trinh vat
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
cua tre » cuu tre, cua triet, dua tren
va tinh » may tinh
su sac » su sach, su cac, su xac
cua te » cua tu
sac ky » cac ky, sai ky

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky lang xa hoi. hieu ve ((hoc thuc) OR (doc thuc)) va tinh va ((cua tre) OR (cua te))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ky lang xa hoi. hieu ve ((hoc thuc) or (doc thuc)) va tinh va ((cua tre) OR (cua te))~".
• Adding a wildcard symbol may retrieve word variants: su sac ky lang xa hoi. hieu ve ((hoc thuc) or (doc thuc)) va tinh va ((cua tre) OR (cua te))*.