Perhaps you should try some spelling variations:
nhieu viec » hieu viec, nhien viet
viec cam » viec lam, viec cua, viec va
dang xay » dang van, van xay
tinh doi » trinh doc, trinh do, tinh hoc
tinh di » trinh di, tinh da, tin di
cam luc » cam xuc, cau luc
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
lang ha » long ha
luc va » duc va, tuc va, loc va
cua te » cua tu

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 xay) or (lang ha)) hoi. nhieu viec cam luc va ((tinh di) or (tinh doi)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky ((dang xay) OR (lang ha)) hoi. nhieu viec cam luc va ((tinh di) OR (tinh doi)) cua te.
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((dang xay) or (lang ha)) hoi. nhieu viec cam luc va ((tinh di) or (tinh doi)) cua te*.