Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
kho tang » cao tang
tu sach » thu sach, su sach, te sach
hieu va » lieu va, hieu qua
ky tang » ky nang, ky dang, ky trong
xuc va » duc va, tuc va, luc va
dam su » da su, dat su, dam tu
dan su » dang su
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 ((ky tang) or (kho tang)) xa hoi. hieu va cam xuc va thanh ((dam su) or (dan su)) viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ky tang) OR (kho tang)) xa hoi. hieu va cam xuc va thanh ((dam su) OR (dan su)) viet.
• Adding a wildcard symbol may retrieve word variants: tu sach ((ky tang) or (kho tang)) xa hoi. hieu va cam xuc va thanh ((dam su) or (dan su)) viet*.