Perhaps you should try some spelling variations:
hai chau » lai chau, ha chau, hat chau
hai cau » hai chu, hai hau, hoi cau
hieu ve » hieu va, hieu van
luc va » duc va, tuc va, loc va
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky
xuc va » duc va, tuc va, xac va
ve cac » va cac, vien cac
nang o » nang co, nang ho, nang ro
o hoi » co hoi, o hoc, o hai

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 o hoi. hieu ve cac ((xuc va) or (luc va)) hanh ((hai cau) OR (hai chau)) treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky nang o hoi. hieu ve cac ((xuc va) OR (luc va)) hanh ((hai cau) OR (hai chau)) treo.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ky nang o hoi. hieu ve cac ((xuc va) or (luc va)) hanh ((hai cau) OR (hai chau)) treo".
• Adding a wildcard symbol may retrieve word variants: su sac ky nang o hoi. hieu ve cac ((xuc va) or (luc va)) hanh ((hai cau) OR (hai chau)) treo*.