Perhaps you should try some spelling variations:
ban thanh » ban hanh
ban hang » ngan hang
hac thuc » hoc thuc, ha thuc, thach thuc
va tinh » may tinh
cuu tre » cua tre, cau tren, cau treo
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
sac ky » cac ky, sai ky
va hac » van hac, va khac, va cac
vi cuu » vi luu, vinh cuu
va sac » va cac, va suc, va san

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

• Performing a fuzzy search may retrieve terms with similar spellings: va sac ky nang xa hoi. hieu va hac thuc ((((ban thanh) OR (ban hang))) or (va tinh)) vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: va sac ky nang xa hoi. hieu va hac thuc ((((ban thanh) OR (ban hang))) OR (va tinh)) vi cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "va sac ky nang xa hoi. hieu va hac thuc ((((ban thanh) OR (ban hang))) or (va tinh)) vi cuu tre".
• Adding a wildcard symbol may retrieve word variants: va sac ky nang xa hoi. hieu va hac thuc ((((ban thanh) OR (ban hang))) or (va tinh)) vi cuu tre*.