Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
hien xanh » hien hanh, hien nhanh, chieu xanh
trung cua » truong cua, trung tuan, trung cap
manh toan » thanh toan, anh tuan, tinh toan
tang cua » mang cua, hang cua, tang luan
san toan » van toan, dan toan, xuan toan

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 ((trung cua) or (tang cua)) thong cong ((san toan) OR (manh toan)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - hanh ((trung cua) OR (tang cua)) thong cong ((san toan) OR (manh toan)) ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien xanh - hanh ((trung cua) or (tang cua)) thong cong ((san toan) OR (manh toan)) ban".
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - hanh ((trung cua) or (tang cua)) thong cong ((san toan) OR (manh toan)) ban*.