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
vu kham » vu khanh
tai cua » thai cua, tai cuc, tri cua
duc van » duc va, duc tan, duc manh
thu ban » thu hang
vu cham » va cham, tu cham, qua cham
nang ma » tang ma, sang ma, nang cao
ban ky » van ky, dan ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu ban ky ((nang ma) or (nang x)) hoi. hieu ((vu cham) or (vu kham)) duc van hanh tai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ban ky ((nang ma) OR (nang x)) hoi. hieu ((vu cham) OR (vu kham)) duc van hanh tai cua triet.
• Adding a wildcard symbol may retrieve word variants: thu ban ky ((nang ma) or (nang x)) hoi. hieu ((vu cham) or (vu kham)) duc van hanh tai cua triet*.