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
sach ty » sach y, sach tu, sach thu
xuc van » duc van, luc van, xuc ban
tu sach » thu sach, su sach, te sach
ty nang » ky nang, ty xang, ty hang
ve cam » ve cham, va cam, ve cai
ve cac » va cac, vien cac
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ty nang x hoi. hieu ((ve cam) or (ve cac)) xuc van hanh kem ((ve triet) OR (va trien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang x hoi. hieu ((ve cam) OR (ve cac)) xuc van hanh kem ((ve triet) OR (va trien)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang x hoi. hieu ((ve cam) or (ve cac)) xuc van hanh kem ((ve triet) OR (va trien))".
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang x hoi. hieu ((ve cam) or (ve cac)) xuc van hanh kem ((ve triet) OR (va trien))*.