Perhaps you should try some spelling variations:
ve triet » va trien
va thanh » gia thanh, ban thanh, va tinh
nang doc » nang luc
su triet » su viet, su tien
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
doc hoi » duoc hoi, hoc hoi, doc hai
va hanh » van hanh, va danh, ban hanh
ve nam » he nam, va nam, le nam

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 ky nang doc hoi. hieu ve nam thu ((va hanh) OR (va thanh)) va ((su triet) or (ve triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang doc hoi. hieu ve nam thu ((va hanh) OR (va thanh)) va ((su triet) OR (ve triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang doc hoi. hieu ve nam thu ((va hanh) OR (va thanh)) va ((su triet) or (ve triet))".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang doc hoi. hieu ve nam thu ((va hanh) OR (va thanh)) va ((su triet) or (ve triet))*.