Perhaps you should try some spelling variations:
triet tinh » trieu tinh, trien tinh, tri tinh
trien kinh » tri kinh, trinh kinh, trien dich
trung tuan » trung thanh, trung tam, tran tuan
dung cua » dung luan, dung cho
tong van » trong van, thong van, tang van
van toan » van tuan, van tan, van thanh
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: mon ((triet tinh) OR (trien kinh)) - hanh ((dung cua) or (trung tuan)) han tong van toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: mon ((triet tinh) OR (trien kinh)) - hanh ((dung cua) OR (trung tuan)) han tong van toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "mon ((triet tinh) OR (trien kinh)) - hanh ((dung cua) or (trung tuan)) han tong van toan cau".
• Adding a wildcard symbol may retrieve word variants: mon ((triet tinh) OR (trien kinh)) - hanh ((dung cua) or (trung tuan)) han tong van toan cau*.