Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh trinh » canh tranh, hanh chinh
hoc chieu » hoc thieu, ho chieu, hoc hien
cong vang » cong lang, cong quang, cong ngang
trinh va » trinh van, trinh vat, trinh ve
cong van » cong san, song van, cong tan
phan tap » phan lap, han tap, pha tap
va hang » van hang, va nang, va lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chieu sach - hanh trinh va hang ((cong van) OR (cong vang)) phan tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu sach - hanh trinh va hang ((cong van) OR (cong vang)) phan tap".
• Adding a wildcard symbol may retrieve word variants: hoc chieu sach - hanh trinh va hang ((cong van) OR (cong vang)) phan tap*.