Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cam truc » cau truc, nam truc, lam truoc
hieu ve » hieu va, hieu van
va hanh » van hanh, va thanh, ban hanh
va danh » va dinh, va dan, dia danh
ve cam » ve cham, ve cac, va cam
sac ky » cac ky, sai ky
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sac ky) or (sach y)) nang x ho. hieu ve cam truc ((va hanh) or (va danh)) vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sac ky) OR (sach y)) nang x ho. hieu ve cam truc ((va hanh) OR (va danh)) vi cua triet.
• Adding a wildcard symbol may retrieve word variants: tu ((sac ky) or (sach y)) nang x ho. hieu ve cam truc ((va hanh) or (va danh)) vi cua triet*.