Perhaps you should try some spelling variations:
trinh thuat » trinh luat, trinh thiet, trinh thuc
chieu xanh » chieu sang, chieu tinh, hieu manh
chieu sach » chinh sach, chiet tach, chieu sang
hanh trinh » canh tranh, hanh chinh
thuat hang » thuat hung, thuat bang, thuat mang
hang cong » dang cong, hang nong, bang cong
cong san » cong tac
than tap » toan tap, phan tap, than cap
han tap » han tai, toan tap, nhan tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu xanh) OR (chieu sach)) - hanh trinh thuat hang cong san ((than tap) or (han tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu xanh) OR (chieu sach)) - hanh trinh thuat hang cong san ((than tap) OR (han tap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu xanh) OR (chieu sach)) - hanh trinh thuat hang cong san ((than tap) or (han tap))".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu xanh) OR (chieu sach)) - hanh trinh thuat hang cong san ((than tap) or (han tap))*.