Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
hanh lam » thanh lap, hanh kem, hanh va
hanh lai » hanh tai, thanh lap, thanh loi
van cham » van chat, van tham, va cham
toc sach » hoc sach, doc sach, thuoc sach
cham xuc » cam xuc, chat xuc, cham soc
xuc van » duc van, luc van, vuc van
cao hoi » cau hoi, cao hoc, tao hoi
co hoi » co hoc, co loi
sach 2 » sach y
2 nang » v nang

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach 2 nang ((cao hoi) or (co hoi)). hieu van cham xuc van ((hanh lai) OR (hanh lam)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach 2 nang ((cao hoi) OR (co hoi)). hieu van cham xuc van ((hanh lai) OR (hanh lam)) cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach 2 nang ((cao hoi) or (co hoi)). hieu van cham xuc van ((hanh lai) OR (hanh lam)) cua triet".
• Adding a wildcard symbol may retrieve word variants: toc sach 2 nang ((cao hoi) or (co hoi)). hieu van cham xuc van ((hanh lai) OR (hanh lam)) cua triet*.