Perhaps you should try some spelling variations:
va trien » va truyen, va thiet, va tuyen
ve triet » su triet
van hanh » van thanh, ban hanh, van anh
su sach » so sach, vu sach
cam tuc » cam tu, nam thuc, dam thuc
hieu ve » hieu va, hieu van
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. hieu ve ((cam tuc) or (cam xuc)) van hanh vi ((ve triet) OR (va trien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang ma hoi. hieu ve ((cam tuc) OR (cam xuc)) van hanh vi ((ve triet) OR (va trien)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang ma hoi. hieu ve ((cam tuc) or (cam xuc)) van hanh vi ((ve triet) OR (va trien))".
• Adding a wildcard symbol may retrieve word variants: su sach y nang ma hoi. hieu ve ((cam tuc) or (cam xuc)) van hanh vi ((ve triet) OR (va trien))*.