Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
hanh nhan » thanh nhan, danh nhan, anh nhan
cac nuoc » cap nuoc, hoc nuoc, cua nuoc
ban hanh » ban hang
nhan cua » nhat cua, nhan luc, nhan su
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
cao hoi » cau hoi, co hoi, cao hoc
cua tre » cua te, cuu tre, cua triet

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 cao hoi. hieu viec ((cac nuoc) or (dat nuoc)) ban hanh nhan cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang cao hoi. hieu viec ((cac nuoc) OR (dat nuoc)) ban hanh nhan cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach ky nang cao hoi. hieu viec ((cac nuoc) or (dat nuoc)) ban hanh nhan cua tre*.