Perhaps you should try some spelling variations:
nhien viet » nghiep viet, trien viet, dien viet
nhin viet » nhan viet, nghia viet, chinh viet
tinh va » tich va, trinh van, trinh vat
tinh di » tinh doi, trinh di, tinh da
sach ky » sac ky, sach y, sach ty
tu sach » thu sach, su sach, te sach
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, tuc va, luc va

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. ((nhien viet) OR (nhin viet)) cam xuc va ((tinh di) or (tinh va)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky dang xa hoi. ((nhien viet) OR (nhin viet)) cam xuc va ((tinh di) OR (tinh va)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky dang xa hoi. ((nhien viet) OR (nhin viet)) cam xuc va ((tinh di) or (tinh va)) cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ky dang xa hoi. ((nhien viet) OR (nhin viet)) cam xuc va ((tinh di) or (tinh va)) cua tre*.