Perhaps you should try some spelling variations:
ve triet » va trien, su triet
sang tao » hang tai
ban hanh » ban hang
van hanh » van thanh, van anh, van ban
sach tu » sach thu, cach tu, sach ty
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
tu sach » thu sach, su sach, te sach
ve cam » ve cham, ve cac, va cam
vi ve » va ve, gi ve, ve ve

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 tu ((nang xa) or (sang tao)) hoi. hieu ve cam xuc ((van hanh) OR (ban hanh)) vi ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach tu ((nang xa) OR (sang tao)) hoi. hieu ve cam xuc ((van hanh) OR (ban hanh)) vi ve triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach tu ((nang xa) or (sang tao)) hoi. hieu ve cam xuc ((van hanh) OR (ban hanh)) vi ve triet".
• Adding a wildcard symbol may retrieve word variants: tu sach tu ((nang xa) or (sang tao)) hoi. hieu ve cam xuc ((van hanh) OR (ban hanh)) vi ve triet*.