Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
tu sach » thu sach, su sach, te sach
sach vu » sach va, sach tu, sach uu
vu nang » vuc nang, va nang, vu dang
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
xuc van » duc van, luc van, vuc van
va cam » va cham, va cac, va cao

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 xa hoi. hieu va cam xuc van hanh ((ki su) OR (ky su)) triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach vu nang xa hoi. hieu va cam xuc van hanh ((ki su) OR (ky su)) triet".
• Adding a wildcard symbol may retrieve word variants: tu sach vu nang xa hoi. hieu va cam xuc van hanh ((ki su) OR (ky su)) triet*.