Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
hanh trinh » hanh chinh
cong hoach » cong hoan, cong sach
hoc thieu » toc thieu, hoc hien
cua nhung » va nhung
cong hoa » dong hoa, dong hoc, hang hoa
toan cau » toan cao, toan ban, toan tap

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - ((hanh trinh) OR (canh tranh)) cua nhung ((cong hoach) OR (cong hoa)) toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sang - ((hanh trinh) OR (canh tranh)) cua nhung ((cong hoach) or (cong hoa)) toan cau~".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - ((hanh trinh) OR (canh tranh)) cua nhung ((cong hoach) or (cong hoa)) toan cau*.