Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
tuong cong » truong cong, trong cong, tong cong
trinh toan » tinh toan, thanh toan, trinh han
doi chieu » doc hieu, doi chi, mot chieu
truong va » truong dai, truong cao, truong dao
trung va » trang va, trung ha, trong va
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: doi chieu sang - thanh ((trung va) or (truong va)) tuong cong trinh toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - thanh ((trung va) OR (truong va)) tuong cong trinh toan tap.
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - thanh ((trung va) or (truong va)) tuong cong trinh toan tap*.