Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
sang tao » hang tai
viec cac » vien cac, viec cua, viec lam
ban lanh » ban hanh, ban linh, ban anh
cua viet » ca viet, hoa viet, cua vat
su sach » vu sach
so sach » so sanh, bo sach, co sach
ky sang » ky nang, ky dang, ky tang
tao hoi » tao khoi, tao boi, tay hoi
cac dua » cach dua, cac qua, cac du
dua ban » dia ban, cua ban, qua ban
dao cua » dai cua, day cua, dan cua

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) or (so sach)) ky sang tao hoi. hieu viec cac dua ban lanh dao cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) ky sang tao hoi. hieu viec cac dua ban lanh dao cua viet.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) ky sang tao hoi. hieu viec cac dua ban lanh dao cua viet*.