Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
hieu van » hieu va, thien van, lieu va
hanh sua » hinh su, hanh va, hanh tu
ly nang » ky nang, ly hang, ly vang
vu nang » vuc nang, va nang, vu dang
van cam » van nam, van lam, van cau
cam loc » cam lo
va hanh » van hanh, va thanh, va danh
su sach » so sach, vu sach
y nang » ky nang, v nang, may nang
loc va » hoc va, luc va
sua va » suat va, vua va, xua 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: su sach ((((y nang) OR (ly nang))) or (vu nang)) x hoi. hieu van cam loc va hanh sua va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((((y nang) OR (ly nang))) OR (vu nang)) x hoi. hieu van cam loc va hanh sua va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((((y nang) OR (ly nang))) or (vu nang)) x hoi. hieu van cam loc va hanh sua va triet".
• Adding a wildcard symbol may retrieve word variants: su sach ((((y nang) OR (ly nang))) or (vu nang)) x hoi. hieu van cam loc va hanh sua va triet*.