Perhaps you should try some spelling variations:
cua triet » su triet, va triet
bieu hien » dieu hien, dieu khien, bien phien
cua viet » ca viet, hoa viet, cua vat
van hanh » van thanh, ban hanh, van anh
hien cac » thien cac, vien cac, hieu cac
su sach » so sach, vu sach
va hanh » va thanh, va danh, ban hanh
cac tru » ca tru, cac tro, cac thu
nang ma » tang ma, sang ma, nang cao
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach y nang ma hoi. bieu hien cac tru ((va hanh) or (van hanh)) vai ((cua triet) OR (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang ma hoi. bieu hien cac tru ((va hanh) OR (van hanh)) vai ((cua triet) OR (cua viet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang ma hoi. bieu hien cac tru ((va hanh) or (van hanh)) vai ((cua triet) OR (cua viet))*".