Perhaps you should try some spelling variations:
chiet tach » chieu sach
hanh trinh » canh tranh, hanh chinh
hoc chiet » hoc thiet, hoc nhiet, hoc hien
trinh vat » trinh van, trinh luat, sinh vat
nang cong » nang song, dang cong, bang cong
vat nang » van nang, va nang, vat mang
cong sat » cong suat, cong san, cong hat
sat phan » sat nhan, vat phan, xuat phan
phan tap » phan lap, han tap, pha tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chiet tach - hanh trinh vat nang cong sat phan tap~.
• Adding a wildcard symbol may retrieve word variants: hoc chiet tach - hanh trinh vat nang cong sat phan tap*.