Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
hanh trung » thanh trung, manh trung, danh trung
hanh trang » thanh trung, canh tranh, hanh trinh
cong thanh » dong thanh, cong trinh, cong tan
cap nhung » cam nhung, vap nhung, dap nhung
cong tac » cong ty
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: toc thieu sang - ((hanh trung) OR (hanh trang)) cap nhung ((cong tac) or (cong thanh)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc thieu sang - ((hanh trung) OR (hanh trang)) cap nhung ((cong tac) OR (cong thanh)) toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc thieu sang - ((hanh trung) OR (hanh trang)) cap nhung ((cong tac) or (cong thanh)) toan cao".
• Adding a wildcard symbol may retrieve word variants: toc thieu sang - ((hanh trung) OR (hanh trang)) cap nhung ((cong tac) or (cong thanh)) toan cao*.