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 cam » trinh cham, trinh cau, trinh tam
nang cong » dang cong, bang cong, hang cong
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 cam ((nang cong) OR (nang song)) sat phan tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chiet tach - hanh trinh cam ((nang cong) OR (nang song)) sat phan tap".
• Adding a wildcard symbol may retrieve word variants: hoc chiet tach - hanh trinh cam ((nang cong) OR (nang song)) sat phan tap*.