Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
nhan luc » nang luc
hanh lai » hanh lam, hanh tai, thanh lap
nang ma » tang ma, sang ma, nang cao
hieu vu » hieu va, hieu ve, hieu su
vu nhan » cu nhan, vu ngan, tu nhan
va hanh » van hanh, va thanh, va danh
nang xa » lang xa, mang xa, ang xa
su sach » so sach, vu sach
luc va » duc va, tuc va, loc va
lai va » loai va, mai va, dai va

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 xa) OR (nang ma))) or (nang x)) hoi. hieu vu nhan luc va hanh lai va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y ((((nang xa) OR (nang ma))) OR (nang x)) hoi. hieu vu nhan luc va hanh lai va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y ((((nang xa) OR (nang ma))) or (nang x)) hoi. hieu vu nhan luc va hanh lai va triet".
• Adding a wildcard symbol may retrieve word variants: su sach y ((((nang xa) OR (nang ma))) or (nang x)) hoi. hieu vu nhan luc va hanh lai va triet*.