Perhaps you should try some spelling variations:
sang lap » sang tao, sang ma, sang tai
ky sang » ky nang, ky dang, ky tang
lap hai » lap tai, lap lai, lap hoat
hieu ve » hieu va, hieu van
cac duc » cac du, cao duc, cac dac
va doan » va doanh, van doan, va dan
doan vi » doan va, don vi, doan thi
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky
ve cac » va cac, vien cac
cua tu » cua tuc, cua su, cua cu

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 lap hai. hieu ve cac duc va doan vi ((cua te) or (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky sang lap hai. hieu ve cac duc va doan vi ((cua te) OR (cua tu)).
• Adding a wildcard symbol may retrieve word variants: su sac ky sang lap hai. hieu ve cac duc va doan vi ((cua te) or (cua tu))*.