Perhaps you should try some spelling variations:
kmay nang » ky nang, kha nang, may nong
may nang » may nong, ky nang, cam nang
van dinh » van minh, van dich, va dinh
va triet » va thiet, va trien, ve triet
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
cac luc » cau luc, coc luc, cac nuoc
luc van » luoc van, luu van, duc van
dinh vu » dich vu, dinh ve, dinh cu
ve cac » va cac, vien cac
x hoi » xa hoi, o hoi, x ho
vu va » vu van, tu va, su va

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 ((may nang) or (kmay nang)) x hoi. hieu ve cac luc van dinh vu va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((may nang) OR (kmay nang)) x hoi. hieu ve cac luc van dinh vu va triet.
• Adding a wildcard symbol may retrieve word variants: tu sach ((may nang) or (kmay nang)) x hoi. hieu ve cac luc van dinh vu va triet*.