Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
hanh doi » thanh doi, hanh noi, hang doi
su triet » su viet, su tien, ve triet
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
cau luc » cau truc, cau phuc
luc van » luoc van, luu van, duc van
y nang » ky nang, ly nang, v nang
ve cau » ke cau, va cau, ve cac
doi su » oi su, do su, voi su
x hoi » xa hoi, o hoi, x ho

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 y nang x hoi. hieu ve cau luc van hanh doi su triet~.
• Adding a wildcard symbol may retrieve word variants: tu sach y nang x hoi. hieu ve cau luc van hanh doi su triet*.