Perhaps you should try some spelling variations:
ve triet » va trien, su triet
nang noi » nang doc
hang doi » hang di, hang loi, huong doi
nang doi » nang doc, nang dong, nhung doi
sach ky » sac ky, sach y, sach ty
tu sach » thu sach, su sach, te sach
cac toc » cac toi, cac nuoc, cac thoi
hieu va » lieu va, hieu qua
dang xa » dang xay, lang xa, dang ha
ky dang » ky nang, ky danh
toc xa » tuc xa, toc ta, hoc xa

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 dang xa hoi. hieu va cac toc xa ((((nang doi) OR (hang doi))) or (nang noi)) ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky dang xa hoi. hieu va cac toc xa ((((nang doi) OR (hang doi))) OR (nang noi)) ve triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky dang xa hoi. hieu va cac toc xa ((((nang doi) OR (hang doi))) or (nang noi)) ve triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ky dang xa hoi. hieu va cac toc xa ((((nang doi) OR (hang doi))) or (nang noi)) ve triet*.