Perhaps you should try some spelling variations:
sang tao » hang tai
nang tai » hang tai, tang tai, sang tai
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
cac hoc » cach hoc, cac hop, bac hoc
va nang » van nang, da nang, cam nang
sac ky » sai ky
ve cac » va cac, vien cac
cuc te » cua te, cuc thue, cuc tieu

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) or (cac ky)) ((nang ma) or (sang tao)) hoi. hieu ve cac hoc va nang tai cuc te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sac ky) OR (cac ky)) ((nang ma) OR (sang tao)) hoi. hieu ve cac hoc va nang tai cuc te.
• Adding a wildcard symbol may retrieve word variants: su ((sac ky) or (cac ky)) ((nang ma) or (sang tao)) hoi. hieu ve cac hoc va nang tai cuc te*.