Perhaps you should try some spelling variations:
trung quan » truong quan, trong quan, trung tuan
trinh cong » trinh dung
hach toan » thanh toan, manh toan
chi xanh » chi anh, chi danh, chi hanh
tung qua » dung qua, tuong quan, duong qua
tac toan » tap toan, tam toan, tich toan
doi chi » doi khi

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chi xanh - thanh ((tung qua) or (trung quan)) trinh cong ((tac toan) OR (hach toan)) tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi xanh - thanh ((tung qua) OR (trung quan)) trinh cong ((tac toan) OR (hach toan)) tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chi xanh - thanh ((tung qua) or (trung quan)) trinh cong ((tac toan) OR (hach toan)) tap".
• Adding a wildcard symbol may retrieve word variants: doi chi xanh - thanh ((tung qua) or (trung quan)) trinh cong ((tac toan) OR (hach toan)) tap*.