Perhaps you should try some spelling variations:
trinh chuan » trinh han, trinh quan, trinh luan
theo chieu » theo tieu, ho chieu, theo chu
tranh chua » tranh cua, tranh chap, trinh chu
mot chieu » doi chieu, ho chieu
bang cong » dang cong, bang song, hang cong
cong tinh » cong trinh, cong vinh, long tinh
toan ban » van ban

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((mot chieu) OR (theo chieu)) xanh - canh ((tranh chua) OR (trinh chuan)) bang cong tinh toan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((mot chieu) or (theo chieu)) xanh - canh ((tranh chua) OR (trinh chuan)) bang cong tinh toan ban~".
• Adding a wildcard symbol may retrieve word variants: ((mot chieu) or (theo chieu)) xanh - canh ((tranh chua) OR (trinh chuan)) bang cong tinh toan ban*.