Perhaps you should try some spelling variations:
chua tri » chua trieu, chua tivi, huu tri
van hanh » van thanh, ban hanh, van anh
sach ky » sac ky, sach y, sach ty
chu tri » chu thi, chu tai, cu tri
hanh va » hang va, hanh vi
duc van » duc va, duc tan, duc manh
cam duc » cam xuc, cao duc, pham duc
te sach » toc sach
hieu ve » hieu va, hieu van
hai hai » khai hai, dai hai, tai hai
hai hoi » dai hoi, hai moi, hai hoa
ky dung » ly dung, ky dang, ky vung
ve cam » ve cham, ve cac, va cam

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

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