Perhaps you should try some spelling variations:
tranh thai » trang thai, tran thi, tinh thai
hoc thieu » toc thieu, hoc hien
thai vung » thai cong, thai van
vung cong » dung cong, vung dong, vung song
tich toan » tinh toan, tich than, trinh toan
hach toan » thanh toan, manh toan
ho chieu » theo chieu, doi chieu, mot chieu

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) OR (hoc thieu)) xanh - canh tranh thai vung cong ((tich toan) or (hach toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (hoc thieu)) xanh - canh tranh thai vung cong ((tich toan) OR (hach toan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) OR (hoc thieu)) xanh - canh tranh thai vung cong ((tich toan) or (hach toan)) cau".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) OR (hoc thieu)) xanh - canh tranh thai vung cong ((tich toan) or (hach toan)) cau*.