Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
dong thanh » truong thanh
hoc thieu » toc thieu, hoc hien
hang tai » hang va, dung tai
cong tac » cong ty
toan cao » toan ban, toan tap
hang ca » hang va, nang cao, hang dau

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 - nhanh ((hang ca) or (hang tai)) nhung ((dong thanh) or (cong tac)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - nhanh ((hang ca) OR (hang tai)) nhung ((dong thanh) OR (cong tac)) toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - nhanh ((hang ca) or (hang tai)) nhung ((dong thanh) or (cong tac)) toan cao*.