Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, hieu lang
khong cong » thong cong, khong cang, chong cong
lieu tinh » trieu tinh, diep tinh, bien tinh
trung hua » trung ha, trung hoa, trung cua
hua khong » hoa khong, cua khong, hoac khong
cong tac » cong ty
tac than » tac thanh, tam than, tac nhan
than cau » toan cau, phan cau, than cap
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 (lieu tinh))) or (hieu va)) - thanh trung hua khong cong tac than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((((chieu sang) OR (lieu tinh))) OR (hieu va)) - thanh trung hua khong cong tac than cau.
• Adding a wildcard symbol may retrieve word variants: ho ((((chieu sang) or (lieu tinh))) or (hieu va)) - thanh trung hua khong cong tac than cau*.