Perhaps you should try some spelling variations:
sach ky » sac ky, sach y, sach ty
hai hai » khai hai, dai hai, tai hai
hai hau » hai chau, dai hau, lai chau
va hanh » van hanh, va thanh, va danh
vu sach » vu bach, su sach, vu khach
cac xuc » cac nuoc, chat xuc, cac cuoc
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: vu sach ky nang o hoi. hieu qua ((cac xuc) or (cam xuc)) va hanh ((hai hau) OR (hai hai)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky nang o hoi. hieu qua ((cac xuc) OR (cam xuc)) va hanh ((hai hau) OR (hai hai)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ky nang o hoi. hieu qua ((cac xuc) or (cam xuc)) va hanh ((hai hau) OR (hai hai)) triet".
• Adding a wildcard symbol may retrieve word variants: vu sach ky nang o hoi. hieu qua ((cac xuc) or (cam xuc)) va hanh ((hai hau) OR (hai hai)) triet*.