Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
viec cac » vien cac, viec cua, viec lam
van hanh » van thanh, ban hanh, van anh
vinh cuu » dinh cuu, sinh cua, dinh cu
sach ky » sach y, sach ty, sach kem
cac xuc » cam xuc, cac nuoc, chat xuc
cuu tre » cua tre, cau tren, cau treo
sac ky » cac ky, sai ky
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: tu ((sach ky) or (sac ky)) nang x hoi. hieu viec cac xuc ((van hanh) or (van minh)) vinh cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sac ky)) nang x hoi. hieu viec cac xuc ((van hanh) OR (van minh)) vinh cuu tre.
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sac ky)) nang x hoi. hieu viec cac xuc ((van hanh) or (van minh)) vinh cuu tre*.