Perhaps you should try some spelling variations:
hieu thien » hieu hien, chieu chien, dieu khien
thien cac » hien cac, thien cau, thieu cac
cac cong » cua cong
hanh vai » hanh va, hanh van, hanh voi
hanh tai » thanh tai, hang tai, han tai
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
cong ha » cong hoa, dong ha, cong tac
cua tu » cua tuc, cua su, cua cu

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 xa hoi. hieu thien cac cong ha ((((hanh vai) or (hanh tai))) or (hanh vi)) cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang xa hoi. hieu thien cac cong ha ((((hanh vai) OR (hanh tai))) OR (hanh vi)) cua tu.
• Adding a wildcard symbol may retrieve word variants: su sach ky nang xa hoi. hieu thien cac cong ha ((((hanh vai) or (hanh tai))) or (hanh vi)) cua tu*.