Perhaps you should try some spelling variations:
ve triet » va trien, su triet
sang tao » hang tai
duc van » duc va, duc tan, duc manh
cam duc » cam xuc, cao duc, pham duc
sach tu » sach thu, cach tu, sach ty
su sach » so sach, vu sach
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
ve cam » ve cham, ve cac, va cam
anh vi » anh va, anh ve, anh vu

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach tu ((lang xa) or (sang tao)) hoi. hieu ve cam duc van ((anh vi) OR (hanh vi)) ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach tu ((lang xa) OR (sang tao)) hoi. hieu ve cam duc van ((anh vi) OR (hanh vi)) ve triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach tu ((lang xa) or (sang tao)) hoi. hieu ve cam duc van ((anh vi) OR (hanh vi)) ve triet*".