Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
cach thuc » anh thuc, cac thu
cac thuc » cac thu, can thuc, cay thuc
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky
vi cua » vai cua
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sac ky nang xa hoi. hieu ve ((cac thuc) OR (cach thuc)) van thanh ((vi cua) or (di cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky nang xa hoi. hieu ve ((cac thuc) OR (cach thuc)) van thanh ((vi cua) OR (di cua)) tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ky nang xa hoi. hieu ve ((cac thuc) OR (cach thuc)) van thanh ((vi cua) or (di cua)) tre*".