Perhaps you should try some spelling variations:
hien xanh » hien hanh, hien nhanh, chieu xanh
trinh cua » trinh luat, trinh quan, trinh luan
tong cong » trong cong, cong cong, dung cong
danh toan » anh toan, dan toan, dang toan
manh toan » thanh toan, anh tuan, tinh toan
tinh cua » sinh cua, tinh chat, tranh cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien xanh - hanh ((trinh cua) OR (tinh cua)) tong cong ((danh toan) or (manh toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - hanh ((trinh cua) OR (tinh cua)) tong cong ((danh toan) OR (manh toan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien xanh - hanh ((trinh cua) OR (tinh cua)) tong cong ((danh toan) or (manh toan)) cau".
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - hanh ((trinh cua) OR (tinh cua)) tong cong ((danh toan) or (manh toan)) cau*.