Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh tai » thanh tai, hang tai, han tai
nang doc » nang luc
van hanh » van thanh, ban hanh, van anh
nang co » nang cao, nang noi, nang hoc
tai cua » thai cua, tai cuc, tri cua
duc van » duc va, duc tan, duc manh
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
ve cac » vien cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ky ((nang co) OR (nang doc)) hoi. hieu ((ve cac) or (va cac)) duc van hanh tai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky ((nang co) OR (nang doc)) hoi. hieu ((ve cac) OR (va cac)) duc van hanh tai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky ((nang co) OR (nang doc)) hoi. hieu ((ve cac) or (va cac)) duc van hanh tai cua triet".
• Adding a wildcard symbol may retrieve word variants: te sac ky ((nang co) OR (nang doc)) hoi. hieu ((ve cac) or (va cac)) duc van hanh tai cua triet*.