Perhaps you should try some spelling variations:
theo chieu » theo tieu, theo chu, thi chieu
hanh trung » thanh trung, hanh trang, manh trung
cong thanh » dong thanh, cong trinh, cong tan
thanh lap » thanh san, phan lap, thanh hai
ho chieu » hoc thieu, doi chieu, mot chieu
trung da » trung dai, trung dam, truong da
da luong » dai luong, do luong, du luong
cong dan » cong san, cong tan, huong dan

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 (theo chieu)) xanh - hanh trung da luong ((cong dan) or (cong thanh)) thanh lap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (theo chieu)) xanh - hanh trung da luong ((cong dan) OR (cong thanh)) thanh lap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) OR (theo chieu)) xanh - hanh trung da luong ((cong dan) or (cong thanh)) thanh lap".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) OR (theo chieu)) xanh - hanh trung da luong ((cong dan) or (cong thanh)) thanh lap*.