Perhaps you should try some spelling variations:
viec khoa » vien khoa, viec khong, lieu khoa
cau treo » cau theo, cau tren, cau triet
viec cho » viec nhom, viec cua, viec so
sach ty » sach y, sach tu, sach thu
sach ky » sac ky, sach y, sach kem
xuc cam » phuc cam
cam dan » cac dan, ca dan, nam dan
dan va » doan va, dan ca, ban va
va cau » van cau, va cac, va dau
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) OR (sach ty)) nang x hoi. hieu ((viec cho) or (viec khoa)) xuc cam dan va cau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ky) OR (sach ty)) nang x hoi. hieu ((viec cho) OR (viec khoa)) xuc cam dan va cau treo.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ky) OR (sach ty)) nang x hoi. hieu ((viec cho) or (viec khoa)) xuc cam dan va cau treo".
• Adding a wildcard symbol may retrieve word variants: su ((sach ky) OR (sach ty)) nang x hoi. hieu ((viec cho) or (viec khoa)) xuc cam dan va cau treo*.