Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, hieu lang
chieu tinh » trieu tinh, lieu tinh, chau tinh
trung cua » truong cua, trung tuan, trung cap
cong cong » cong dong, trong cong, dung cong
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cau » toan cao, toan ban, toan tap
hieu va » lieu va, hieu qua

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 (chieu tinh))) or (hieu va)) - thanh trung cua cong cong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((((chieu sang) OR (chieu tinh))) OR (hieu va)) - thanh trung cua cong cong tac toan cau.
• Adding a wildcard symbol may retrieve word variants: ho ((((chieu sang) or (chieu tinh))) or (hieu va)) - thanh trung cua cong cong tac toan cau*.