Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
tu sach » thu sach, su sach, te sach
hieu va » lieu va, hieu qua
cac xuc » cam xuc, cac nuoc, chat xuc
ky dang » ky nang, ky danh
ky tang » ky nang, kho tang, ky trong
xuc va » duc va, tuc va, luc va
dam su » dan su, dat su, dam tu
da su » dan su, dat su, va su

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 tang) OR (ky dang)) xa hoi. hieu va cac xuc va thanh ((dam su) or (da su)) viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ky tang) OR (ky dang)) xa hoi. hieu va cac xuc va thanh ((dam su) OR (da su)) viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ky tang) OR (ky dang)) xa hoi. hieu va cac xuc va thanh ((dam su) or (da su)) viet".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ky tang) OR (ky dang)) xa hoi. hieu va cac xuc va thanh ((dam su) or (da su)) viet*.