Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
cong ngang » cong nhan, cong quang, cong lang
ngang toan » nganh toan, dang toan, quang toan
hien xanh » hien hanh, hien nhanh, chieu xanh
tang luan » dung luan
doanh cua » doanh luan
tang cua » mang cua, hang cua, thong cua
toan ban » van ban

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