Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
hieu van » hieu va, thien van, lieu va
nam duoc » nam thuoc, da duoc, dat duoc
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
cam duc » cam xuc, cao duc, lam duoc
san cua » sang cua, ban cua, dan cua
su sac » su sach, su cac, su xac
cua te » cua tu
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 lang xa hoi. hieu van ((((cam duc) OR (nam duoc))) OR (pham duc)) ban thanh san cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ky lang xa hoi. hieu van ((((cam duc) OR (nam duoc))) or (pham duc)) ban thanh san cua te~".
• Adding a wildcard symbol may retrieve word variants: su sac ky lang xa hoi. hieu van ((((cam duc) OR (nam duoc))) or (pham duc)) ban thanh san cua te*.