Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thai cua » than cua, tai cuc, tri cua
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
hieu va » lieu va, hieu qua
cam duc » cam xuc, cao duc, nam duoc
hai cua » dai cua, hoi cua, lai cua
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky

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

• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky dang xa hoi. hieu va ((cam duc) OR (pham duc)) ban thanh ((hai cua) OR (thai cua)) tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ky dang xa hoi. hieu va ((cam duc) or (pham duc)) ban thanh ((hai cua) OR (thai cua)) tre~".
• Adding a wildcard symbol may retrieve word variants: su sac ky dang xa hoi. hieu va ((cam duc) or (pham duc)) ban thanh ((hai cua) OR (thai cua)) tre*.