Perhaps you should try some spelling variations:
vien dai » hien dai
hanh vai » hanh vi, hanh va, hanh tai
van hanh » van thanh, ban hanh, van anh
vien da » hien dai
vai cua » dai cua, hai cua, lai cua
nang xa » nang x, lang xa, nang ma
sac ky » cac ky
cua te » cua tu

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) or (sai ky)) nang xa hoi. hieu ((vien da) OR (vien dai)) vo van hanh vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sac ky) OR (sai ky)) nang xa hoi. hieu ((vien da) OR (vien dai)) vo van hanh vai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sac ky) or (sai ky)) nang xa hoi. hieu ((vien da) OR (vien dai)) vo van hanh vai cua te".
• Adding a wildcard symbol may retrieve word variants: su ((sac ky) or (sai ky)) nang xa hoi. hieu ((vien da) OR (vien dai)) vo van hanh vai cua te*.