Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh lai » hanh lam, hanh tai, thanh lap
van hanh » van thanh, ban hanh, van anh
toc sach » hoc sach, doc sach, thuoc sach
va cham » va chat
va tham » van tham, va thanh, va thuat
xuc van » duc van, luc van, vuc van
cao hoi » cau hoi, cao hoc, tao hoi
lai cua » dai cua, hai cua, lai chau
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)). lieu ((va cham) OR (va tham)) xuc van hanh lai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach 2 nang ((cao hoi) OR (co hoi)). lieu ((va cham) OR (va tham)) xuc van hanh lai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach 2 nang ((cao hoi) or (co hoi)). lieu ((va cham) OR (va tham)) xuc van hanh lai cua triet".
• Adding a wildcard symbol may retrieve word variants: toc sach 2 nang ((cao hoi) or (co hoi)). lieu ((va cham) OR (va tham)) xuc van hanh lai cua triet*.