Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
viec lam » viec va
lang van » dang van, tang van, hoang van
tinh di » tinh doi, trinh di, tinh da
duoc ma » duoc lam
duoc va » nuoc va, duc va, duong va
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
lang xa » lang ha, dang xay
cua tre » cua te, cuu tre, cua triet
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 van)) hoi. hieu viec lam ((duoc va) or (duoc ma)) tinh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky ((lang xa) OR (lang van)) hoi. hieu viec lam ((duoc va) OR (duoc ma)) tinh di cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((lang xa) or (lang van)) hoi. hieu viec lam ((duoc va) or (duoc ma)) tinh di cua tre*.