Perhaps you should try some spelling variations:
trung tuan » trung thanh, trung tam, tran tuan
doi chieu » doc hieu, doi chi, mot chieu
trung cua » truong cua, trung cap, dung cua
vat khong » va khong, vat khoa, vat trong
khong tan » khong ton, khong van, khong thanh
ho chieu » theo chieu, hoc thieu, mot chieu
tan toan » tan tran, tap toan, van toan
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: ((ho chieu) OR (doi chieu)) tinh - thanh ((trung cua) or (trung tuan)) vat khong tan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (doi chieu)) tinh - thanh ((trung cua) OR (trung tuan)) vat khong tan toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) OR (doi chieu)) tinh - thanh ((trung cua) or (trung tuan)) vat khong tan toan cau".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) OR (doi chieu)) tinh - thanh ((trung cua) or (trung tuan)) vat khong tan toan cau*.