Perhaps you should try some spelling variations:
thanh trung » thanh tung
hieu quang » thieu quang, hieu quan, hieu qua
chieu sang » chieu sach, chieu xanh, nhieu tang
nhung cong » dung cong, thong cong, hang cong
hieu lang » nhieu tang, hieu van, biet lang
trung cua » truong cua, trung tuan, trung cap
cua nhung » va nhung
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
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: he ((((hieu lang) OR (hieu quang))) or (chieu sang)) - thanh trung cua nhung cong tac toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: he ((((hieu lang) OR (hieu quang))) OR (chieu sang)) - thanh trung cua nhung cong tac toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "he ((((hieu lang) OR (hieu quang))) or (chieu sang)) - thanh trung cua nhung cong tac toan tap".
• Adding a wildcard symbol may retrieve word variants: he ((((hieu lang) OR (hieu quang))) or (chieu sang)) - thanh trung cua nhung cong tac toan tap*.