Perhaps you should try some spelling variations:
sang tao » hang tai
hieu van » hieu va, thien van, lieu va
su sach » so sach
cam tuc » cam xuc, cam tu, nam thuc
vu sach » vu bach, vu khach
ky sang » ky nang, ky dang, ky tang
tao hai » tao dai, tao tai, tai hai
hieu ve » hieu va
va cua » va chua, via cua, ca cua
dan va » doan va, dan ca, ban va
va dan » ca dan, va dao, va dau
cua te » cua tu
tuc va » thuc va, truc va, tuc xa

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (vu sach)) ky sang tao hai. ((hieu ve) OR (hieu van)) cam tuc va dan va cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) ky sang tao hai. ((hieu ve) OR (hieu van)) cam tuc va dan va cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (vu sach)) ky sang tao hai. ((hieu ve) OR (hieu van)) cam tuc va dan va cua te".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu sach)) ky sang tao hai. ((hieu ve) OR (hieu van)) cam tuc va dan va cua te*.