Perhaps you should try some spelling variations:
trung tuan » trung thanh, trung tam, tran tuan
doi chieu » doc hieu, ho chieu, mot chieu
trung cua » truong cua, trung cap, dung cua
cong tan » cong tac, cong san, cong thanh
tan tinh » tan thinh, ban tinh, man tinh
toan cau » toan cao, toan ban, toan tap
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 chieu) or (doi chi)) xanh - hanh ((trung cua) or (trung tuan)) cong tan tinh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (doi chi)) xanh - hanh ((trung cua) OR (trung tuan)) cong tan tinh toan cau.
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (doi chi)) xanh - hanh ((trung cua) or (trung tuan)) cong tan tinh toan cau*.