Perhaps you should try some spelling variations:
sang tao » hang tai
sang lap » sang ma, sang tai, dan lap
hieu van » hieu va, thien van, lieu va
cam luc » cam xuc, cau luc
hieu ve » hieu va
su sac » su sach, su cac, su xac
vi cua » vai cua, di cua
dan vi » doan vi, don vi, dan va
va dan » ca dan, va dao, va dau
luc va » duc va, tuc va, loc va
cua te » cua tu
sac ky » cac ky, sai ky

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) or (sang tao)) hai. ((hieu ve) OR (hieu van)) cam luc va dan vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky ((sang lap) OR (sang tao)) hai. ((hieu ve) OR (hieu van)) cam luc va dan vi cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ky ((sang lap) or (sang tao)) hai. ((hieu ve) OR (hieu van)) cam luc va dan vi cua te*".