Perhaps you should try some spelling variations:
dung phuong » dung thuong, bang phuong, dung chung
hanh trung » thanh trung, hanh trang, manh trung
chieu sang » chieu sach, chieu xanh, hieu lang
trung tuan » trung thanh, trung tam, tran tuan
cong huong » cong thuong, cong luong, cong hung
hieu sang » hieu lang, hieu quang, nhieu tang
toan tap » toan ban

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

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