Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
hanh trinh » canh tranh, hanh chinh
nhung cong » dung cong, thong cong, hang cong
hien sang » hien trang, khien bang, thien bang
trinh cua » tinh cua, trinh luat, trinh quan
cua nhung » va nhung
cong hach » cong sach, cong thanh, cong khanh
toan cau » toan cao, toan tap, toan tai
toan ban » van ban

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

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