Perhaps you should try some spelling variations:
chieu chien » thien chien, hieu hien
hieu thien » hieu hien, dieu khien, bieu hien
hanh tai » thanh tai, hang tai, han tai
so sach » so sanh, bo sach, co sach
nang xa » nang x, lang xa, nang ma
sach ky » sac ky, sach y, sach ty
hanh va » hang va, hanh vi
cac co » cac cong
cua te » cua tu
co va » co ma, do va, so va

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ky nang xa hoi. ((hieu thien) or (chieu chien)) cac co va ((hanh va) or (hanh tai)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky nang xa hoi. ((hieu thien) OR (chieu chien)) cac co va ((hanh va) OR (hanh tai)) cua te.
• Adding a wildcard symbol may retrieve word variants: so sach ky nang xa hoi. ((hieu thien) or (chieu chien)) cac co va ((hanh va) or (hanh tai)) cua te*.