Perhaps you should try some spelling variations:
te sach » toc sach
hieu va » lieu va, hieu qua
ho nang » thi nang, kha nang, cao nang
lo nang » ly nang, loai nang, cao nang
xuc va » duc va, tuc va, luc va
va dan » ca dan, va dao, va dau
va cam » va cham, va cac, va cao
vi cu » vi su, vi xu
vi du » vi dum, va du, ve du

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ((lo nang) OR (ho nang)) xa hoi. hieu va cam xuc va dan ((vi cu) or (vi du)) tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((lo nang) OR (ho nang)) xa hoi. hieu va cam xuc va dan ((vi cu) OR (vi du)) tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((lo nang) OR (ho nang)) xa hoi. hieu va cam xuc va dan ((vi cu) or (vi du)) tren".
• Adding a wildcard symbol may retrieve word variants: te sach ((lo nang) OR (ho nang)) xa hoi. hieu va cam xuc va dan ((vi cu) or (vi du)) tren*.