Perhaps you should try some spelling variations:
nhieu viec » hieu viec, nhien viet
trinh di » trinh do, trinh dien, trinh dinh
va trinh » van trinh, va tinh, lap trinh
viec cam » viec lam, viec cua, viec va
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
cua tre » cua te, cuu tre, cua triet
long ha » dong ha, cong ha, dong hoa
lang xa » dang xay, lang van
xuc va » duc va, tuc va, luc va
di cua » dai cua, doi cua, de cua

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