Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong con, truong cong
thuong dong » phuong dong, tuong dong, chuong dong
lieu tinh » trieu tinh, diep tinh, bien tinh
tung phan » trung phan, tuong phan, tung pham
dung phan » dung nhan, dung luan, dung ha
tan toan » tan tran, tap toan, van toan
toan cau » toan cao, toan ban, toan tap
ho lieu » so lieu, co lieu, ho kieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho lieu tinh - thanh ((tung phan) OR (dung phan)) ((thuong cong) or (thuong dong)) tan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho lieu tinh - thanh ((tung phan) OR (dung phan)) ((thuong cong) OR (thuong dong)) tan toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho lieu tinh - thanh ((tung phan) OR (dung phan)) ((thuong cong) or (thuong dong)) tan toan cau".
• Adding a wildcard symbol may retrieve word variants: ho lieu tinh - thanh ((tung phan) OR (dung phan)) ((thuong cong) or (thuong dong)) tan toan cau*.