Perhaps you should try some spelling variations:
nang tai » hang tai, tang tai, sang tai
sang tao » hang tai
cac toi » cac thoi
nang ma » tang ma, sang ma, nang cao
tai cua » thai cua, tai cuc, tri cua
hieu ve » hieu va, hieu van
cac toc » cac nuoc, cac thoi
su sac » su sach, su cac, su xac
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 ((nang ma) or (sang tao)) hoi. hieu ve ((cac toc) OR (cac toi)) cam nang tai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky ((nang ma) OR (sang tao)) hoi. hieu ve ((cac toc) OR (cac toi)) cam nang tai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ky ((nang ma) or (sang tao)) hoi. hieu ve ((cac toc) OR (cac toi)) cam nang tai cua te".
• Adding a wildcard symbol may retrieve word variants: su sac ky ((nang ma) or (sang tao)) hoi. hieu ve ((cac toc) OR (cac toi)) cam nang tai cua te*.