Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van hanh » van thanh, ban hanh, van anh
hai cua » thai cua, dai cua, hoi cua
va danh » va dinh, va dan, va hanh
cam luc » cam xuc, cau luc
hieu ve » hieu va, hieu van
ky dang » ky nang, ky danh
ky hang » ky nang, ly hang, ty hang
ve cam » ve cham, ve cac, va cam
su tai » su thi, tu tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: su tai ((ky hang) or (ky dang)) cau hoi. hieu ve cam luc ((van hanh) or (va danh)) hai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su tai ((ky hang) OR (ky dang)) cau hoi. hieu ve cam luc ((van hanh) OR (va danh)) hai cua triet.
• Adding a wildcard symbol may retrieve word variants: su tai ((ky hang) or (ky dang)) cau hoi. hieu ve cam luc ((van hanh) or (va danh)) hai cua triet*.