Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
ve triet » va trien, su triet
tu sach » thu sach, su sach, te sach
sach vu » sach va, sach tu, sach uu
nang ma » sang ma, nang cao, mang may
tang ma » mang may, tang van
hieu va » lieu va, hieu qua
xuc van » duc van, luc van, vuc van
hanh ki » hanh vi, hanh ky, hanh kien
va cam » va cham, va cac, va cao
ki ve » ke ve, gi ve, vi 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 vu ((nang ma) or (tang ma)) hoi. hieu va cam xuc van hanh ki ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach vu ((nang ma) OR (tang ma)) hoi. hieu va cam xuc van hanh ki ve triet.
• Adding a wildcard symbol may retrieve word variants: tu sach vu ((nang ma) or (tang ma)) hoi. hieu va cam xuc van hanh ki ve triet*.