Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van hanh » van thanh, ban hanh, van anh
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
va danh » va dinh, va dan, va hanh
ve cam » ve cham, ve cac, va cam
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 sach ky ((nang xa) or (nang cao)) hoi. hieu ve cam xuc ((va danh) or (van hanh)) vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky ((nang xa) OR (nang cao)) hoi. hieu ve cam xuc ((va danh) OR (van hanh)) vi cua triet.
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((nang xa) or (nang cao)) hoi. hieu ve cam xuc ((va danh) or (van hanh)) vi cua triet*.