Perhaps you should try some spelling variations:
dang hai » dang khai, hang hai, dung hai
chu tai » chiu tai, chu thi, cu tai
va hanh » van hanh, va thanh, va danh
ky dang » ky nang, ky danh
hai hoi » dai hoi, hai moi, hai hai
hieu ve » hieu van
chu tri » chua tri, chu thi, cu tri
hieu va » lieu va, hieu qua
hanh va » hang va, hanh vi
cam loc » cam lo
te sac » te sach, te cac, te san
loc va » hoc va, luc va
sac ky » cac ky, sai ky

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ky dang hai hoi. ((hieu ve) or (hieu va)) cam loc va hanh va ((chu tri) OR (chu tai))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky dang hai hoi. ((hieu ve) OR (hieu va)) cam loc va hanh va ((chu tri) OR (chu tai))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky dang hai hoi. ((hieu ve) or (hieu va)) cam loc va hanh va ((chu tri) OR (chu tai))*".