Perhaps you should try some spelling variations:
thanh nung » thanh tung, thanh hung, thanh trung
thanh dung » thanh duong, thanh tung, thanh hung
nhung cong » dung cong, thong cong, hang cong
lieu tinh » trieu tinh, diep tinh, bien tinh
cao nhung » cho nhung, cam nhung, cao chung
tac toan » tam toan, hach toan, tich toan
tap toan » tap doan, tap quan, bai toan
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 nung) or (thanh dung)) cao nhung cong ((tac toan) OR (tap toan)) tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho lieu tinh - ((thanh nung) OR (thanh dung)) cao nhung cong ((tac toan) OR (tap toan)) tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho lieu tinh - ((thanh nung) or (thanh dung)) cao nhung cong ((tac toan) OR (tap toan)) tap".
• Adding a wildcard symbol may retrieve word variants: ho lieu tinh - ((thanh nung) or (thanh dung)) cao nhung cong ((tac toan) OR (tap toan)) tap*.