Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
cach hoc » cach thuc, cach thoi, dich hoc
thu san » thuy san, thu ban, phu san
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va cach » va cac
va hanh » van hanh, va thanh, va danh
luu tre » luu tru, cuu tre, luy tre
san ky » sang ky, van ky, dan ky
vi luu » vi lua

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu san ky nang xa hoi. hieu va cach hoc ((va hanh) OR (((le thanh) OR (ban thanh)))) vi luu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu san ky nang xa hoi. hieu va cach hoc ((va hanh) OR (((le thanh) OR (ban thanh)))) vi luu tre".
• Adding a wildcard symbol may retrieve word variants: thu san ky nang xa hoi. hieu va cach hoc ((va hanh) OR (((le thanh) OR (ban thanh)))) vi luu tre*.