Perhaps you should try some spelling variations:
sang tao » hang tai
danh doi » danh di, thanh doi, dung doi
hieu ve » hieu va, hieu van
cac tuc » cac toc, cac tu, cac tac
sang ma » tang ma, nang ma, mang may
cua tre » cuu tre, cua triet, dua tren
xa danh » va danh, dia danh, nam danh
su sac » su sach, su cac, su xac
ve cac » va cac, vien cac
sac ky » cac ky, sai ky
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sac ky ((sang ma) OR (sang tao)) hoi. hieu ve cac tuc xa danh doi ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky ((sang ma) OR (sang tao)) hoi. hieu ve cac tuc xa danh doi ((cua tre) OR (cua te))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ky ((sang ma) OR (sang tao)) hoi. hieu ve cac tuc xa danh doi ((cua tre) or (cua te))*".