Perhaps you should try some spelling variations:
cac thuc » cach thuc, cac thu, can thuc
van hanh » van thanh, ban hanh, van anh
nang xa » nang x, lang xa, nang ma
qua cac » cua cac
va hanh » va thanh, va danh, ban hanh
luu tre » luu tru, cuu tre, luy tre
su xac » pu xac
su cac » tu cac, su cao, su can
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: ((su xac) or (su cac)) ky nang xa hoi. hieu qua cac thuc ((va hanh) OR (van hanh)) vi luu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su xac) OR (su cac)) ky nang xa hoi. hieu qua cac thuc ((va hanh) OR (van hanh)) vi luu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su xac) or (su cac)) ky nang xa hoi. hieu qua cac thuc ((va hanh) OR (van hanh)) vi luu tre".
• Adding a wildcard symbol may retrieve word variants: ((su xac) or (su cac)) ky nang xa hoi. hieu qua cac thuc ((va hanh) OR (van hanh)) vi luu tre*.