Perhaps you should try some spelling variations:
hieu cac » hieu luc, hieu va, hieu van
hanh tai » thanh tai, hang tai, han tai
vien cac » vien bach, vien dai, vien da
hanh vai » hanh vi, hanh va, hanh van
nang xa » nang x, lang xa, nang ma
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky
cua te » cua tu
lo va » lo van, lao va, ly va

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