Perhaps you should try some spelling variations:
suu viet » su viet, sau viet, sieu viet
kho tang » cao tang
lanh da » lanh dao, lanh va, danh dau
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, luc va, xac va
tuc va » thuc va, truc va, tuc xa
da suu » dao suu, da su
va cao » va cac, va co, va dao

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

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