Perhaps you should try some spelling variations:
chieu sang » chieu sach, hieu lang, nhieu tang
chieu xanh » chieu sach, chieu tinh, hieu manh
hanh trong » hanh trang, anh trong, hinh trong
dung cong » dung trong
trong ca » trong cac, trong nha
cong van » cong vang, cong san, song van
toan tap » toan ban
ca dung » cao dung, cap dung, cu dung
han tap » han tai, nhan tai, nhan tao

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu sang) or (chieu xanh)) - hanh trong ca dung cong van ((han tap) OR (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sang) OR (chieu xanh)) - hanh trong ca dung cong van ((han tap) OR (toan tap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sang) or (chieu xanh)) - hanh trong ca dung cong van ((han tap) OR (toan tap))".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sang) or (chieu xanh)) - hanh trong ca dung cong van ((han tap) OR (toan tap))*.