Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
tranh thai » trang thai, tran thi, tinh thai
thai vung » thai cong, thai van
vung cong » dung cong, vung dong, vung song
hach toan » thanh toan, manh toan
ho chieu » theo chieu, hoc thieu, doi chieu
tap toan » tap doan, tap quan, bai toan

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 tinh - canh tranh thai vung cong ((tap toan) OR (hach toan)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu tinh - canh tranh thai vung cong ((tap toan) OR (hach toan)) cau".
• Adding a wildcard symbol may retrieve word variants: ho chieu tinh - canh tranh thai vung cong ((tap toan) OR (hach toan)) cau*.