Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu xanh » chieu sach, chieu sang, chieu tinh
nhung cong » dung cong, thong cong, hang cong
tang luan » dung luan
tang cua » mang cua, hang cua, thong cua
cong tac » cong ty
tac tren » rac tren, tai tren, tap tren
tren cau » tren ca, tren cay, tren tau

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chieu xanh - hanh ((tang cua) OR (tang luan)) nhung cong tac tren cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu xanh - hanh ((tang cua) OR (tang luan)) nhung cong tac tren cau".
• Adding a wildcard symbol may retrieve word variants: theo chieu xanh - hanh ((tang cua) OR (tang luan)) nhung cong tac tren cau*.