Perhaps you should try some spelling variations:
khong cong » thong cong, khong cang, chong cong
thiet yeu » thiet ke, theo yeu
tranh cua » doanh cua
san chinh » lan chinh, van chinh, ban chinh
chinh cau » chinh chau, chinh ca, chinh can
manh cua » doanh cua, ban cua
cong san » cong tac

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((theo tieu) or (thiet yeu)) lang - hanh ((tranh cua) OR (manh cua)) khong cong san chinh cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo tieu) OR (thiet yeu)) lang - hanh ((tranh cua) OR (manh cua)) khong cong san chinh cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo tieu) or (thiet yeu)) lang - hanh ((tranh cua) OR (manh cua)) khong cong san chinh cau".
• Adding a wildcard symbol may retrieve word variants: ((theo tieu) or (thiet yeu)) lang - hanh ((tranh cua) OR (manh cua)) khong cong san chinh cau*.