Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh tai » thanh tai, hang tai, han tai
van hanh » van thanh, ban hanh, van anh
ve cham » va cham, ve chat, vu cham
tai cua » thai cua, tai cuc, tri cua
xuc van » duc van, luc van, vuc van
tu sach » thu sach, su sach, te sach
sach ha » sach nha, sach han, sach xa
dai hoi » dai hoc, dai hai, dai moi
mai doi » moi doi, mai hoi, mai khoi
ha lang » hoa lang, ha tang, va lang
ve cam » ve cac, va cam, ve cai

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 ha lang ((mai doi) or (dai hoi)). hieu ((ve cam) or (ve cham)) xuc van hanh tai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ha lang ((mai doi) OR (dai hoi)). hieu ((ve cam) OR (ve cham)) xuc van hanh tai cua triet.
• Adding a wildcard symbol may retrieve word variants: tu sach ha lang ((mai doi) or (dai hoi)). hieu ((ve cam) or (ve cham)) xuc van hanh tai cua triet*.