Perhaps you should try some spelling variations:
cau triet » cau trieu, su triet, cua triet
hieu van » hieu va, thien van, lieu va
so sach » so sanh, bo sach, co sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
van lam » van nam
lam loc » lam duoc, lam ngoc
loc van » luoc van, hoc van, lo van
hanh va » hang va
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: so sach ty nang x hoi. hieu van lam loc van ((hanh va) or (hanh vi)) cau triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ty nang x hoi. hieu van lam loc van ((hanh va) OR (hanh vi)) cau triet*.