Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
hoc luc » hoc duc, hoc lua, coc luc
va tinh » may tinh
doi cua » dai cua, hoi cua
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky
va hoc » van hoc
cua tu » cua tuc, cua su, cua cu

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 nang xa hoi. hieu va hoc luc ((ban thanh) OR (va tinh)) doi cua tu~.
• Adding a wildcard symbol may retrieve word variants: su sac ky nang xa hoi. hieu va hoc luc ((ban thanh) or (va tinh)) doi cua tu*.