Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
viec khoa » vien khoa, viec khong, lieu khoa
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
khoa xu » khoa x, hoa xu, khoa thu
cam dan » cac dan, ca dan, cay dan
nam dan » nam dinh
cuu tre » cua tre, cau tren, cau treo
vi cuu » vi luu, vinh cuu
x hoi » xa hoi, o hoi, x ho

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 ky nang x hoi. hieu viec khoa xu ((cam dan) OR (nam dan)) vi cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang x hoi. hieu viec khoa xu ((cam dan) OR (nam dan)) vi cuu tre".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang x hoi. hieu viec khoa xu ((cam dan) OR (nam dan)) vi cuu tre*.