Perhaps you should try some spelling variations:
trieu dinh » trieu tinh, trieu minh, trien dich
chieu sach » chinh sach, chiet tach, chieu sang
cua nhung » va nhung
hanh han » hanh nhan, hanh phan, hanh san
cong tan » cong tac, cong thanh, cong ty
cong san » cong tac
toan cau » toan cao, toan ban, toan tap
han cua » hang cua, nhan cua, than cua

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

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