Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
hanh trinh » canh tranh, hanh chinh
cong thanh » dong thanh, cong trinh, truong thanh
hoc thieu » toc thieu, hoc hien
trinh cua » tinh cua, trinh luat, trinh quan
cua nhung » va nhung
cong tan » cong tac, cong san, cong ha
toan cao » toan ban, toan tap

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

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