Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
thanh tinh » thanh binh, nhanh tinh, than kinh
trung cong » truong cong, trong cong, trung uong
hoc thieu » toc thieu, hoc hien
cua trung » cua truong, xuan trung, cua nhung
tinh cua » trinh cua, sinh cua, tinh chat
san ban » sang ban, van ban, san van
can ban » van ban, toan 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 thieu xanh - thanh tinh cua trung cong trinh ((san ban) OR (can ban))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - thanh tinh cua trung cong trinh ((san ban) OR (can ban))*".