Perhaps you should try some spelling variations:
nhan luc » nang luc
van hanh » van thanh, ban hanh, van anh
su sach » so sach, vu sach
sach tu » sach thu, cach tu, sach ty
tu nang » tru nang, tu nong, tu nano
nang ma » tang ma, sang ma, nang cao
hieu cu » hieu cua, hieu ca, hieu su
cu nhan » ca nhan
luc van » luoc van, luu van, duc van
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 tu nang ma hoi. hieu cu nhan luc van hanh ((ve su) or (va su)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach tu nang ma hoi. hieu cu nhan luc van hanh ((ve su) OR (va su)) triet*.