Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
thanh tung » thanh cong
hieu manh » chieu xanh, hieu nganh, dieu hanh
dung cong » dung trong
tung cap » trung cap, cung cap, thong cap
cap dung » ap dung, cao dung, chan dung
tran van » luan van
tan van » tang van, luan van, dang van

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chieu sang) or (hieu manh)) - thanh tung cap dung cong ((tan van) OR (tran van)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sang) OR (hieu manh)) - thanh tung cap dung cong ((tan van) OR (tran van)) ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sang) or (hieu manh)) - thanh tung cap dung cong ((tan van) OR (tran van)) ban".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sang) or (hieu manh)) - thanh tung cap dung cong ((tan van) OR (tran van)) ban*.