Perhaps you should try some spelling variations:
trinh cua » trinh luat, trinh quan, trinh luan
chi xanh » chi anh, chi danh, chi hanh
tinh cua » sinh cua, tinh chat, tranh cua
cong tan » cong san, cong thanh, cong ty
cong tac » cong ty
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 chi xanh - hanh ((trinh cua) OR (tinh cua)) khong ((cong tan) or (cong tac)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi xanh - hanh ((trinh cua) OR (tinh cua)) khong ((cong tan) OR (cong tac)) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chi xanh - hanh ((trinh cua) OR (tinh cua)) khong ((cong tan) or (cong tac)) toan cau".
• Adding a wildcard symbol may retrieve word variants: doi chi xanh - hanh ((trinh cua) OR (tinh cua)) khong ((cong tan) or (cong tac)) toan cau*.