Perhaps you should try some spelling variations:
va trien » va truyen, va thiet, va tuyen
hieu van » hieu va, thien van, lieu va
ve triet » su triet
hanh doi » thanh doi, hanh noi, hang doi
va hanh » van hanh, va thanh, va danh
ban luc » van luc, bao luc, nang luc
nang xa » nang x, lang xa, nang ma
su sach » so sach, vu sach
luc va » duc va, tuc va, loc va
su sac » su cac, su xac

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sac) or (su sach)) ky nang xa hoi. hieu van ban luc va hanh doi ((ve triet) or (va trien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sac) OR (su sach)) ky nang xa hoi. hieu van ban luc va hanh doi ((ve triet) OR (va trien)).
• Adding a wildcard symbol may retrieve word variants: ((su sac) or (su sach)) ky nang xa hoi. hieu van ban luc va hanh doi ((ve triet) or (va trien))*.