Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
dang khai » dang khoi, quang khai, dang thi
viec cac » vien cac, viec cua, viec lam
duc tran » duc tan, duc toan, duc tren
dang hai » hang hai, dung hai, dong hai
cua viet » ca viet, hoa viet, cua vat
su sach » so sach, vu sach
cac duc » cac du, cao duc, cac dac
anh va » hanh va
va hoi » xa hoi, va hoc, va hoa
y anh » ly anh, ty anh, ky anh

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach y anh va hoi. hieu viec cac duc tran ((dang hai) or (dang khai)) cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y anh va hoi. hieu viec cac duc tran ((dang hai) OR (dang khai)) cua viet.
• Adding a wildcard symbol may retrieve word variants: su sach y anh va hoi. hieu viec cac duc tran ((dang hai) or (dang khai)) cua viet*.