Perhaps you should try some spelling variations:
cau triet » cau trieu, su triet, cua triet
hanh vai » hanh vi, hanh va, hanh tai
van hanh » van thanh, ban hanh, van anh
va chat » van chat, va phat, cao chat
vai cau » va cau, van cau, vai cac
xuc van » duc van, luc van, vuc van
tu sach » thu sach, su sach, te sach
sach lo » sach dao, sach doi, sach hoi
dai hoi » dai hoc, dai hai, dai moi
mai hoi » mai khoi, lai hoi, mai doi
lo lang » o lang, so lang, le lang
ve cam » ve cham, ve cac, va cam

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