Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
cong thanh » dong thanh, cong trinh, truong thanh
hoc thieu » toc thieu, hoc hien
trinh cua » trinh luat, trinh quan, trinh luan
tinh cua » sinh cua, tinh chat, tranh cua
cong tan » cong tac, cong san, cong ty
toan cao » toan ban, toan tap

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - hanh ((trinh cua) OR (tinh cua)) nhung ((cong tan) OR (cong thanh)) toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - hanh ((trinh cua) OR (tinh cua)) nhung ((cong tan) or (cong thanh)) toan cao~".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - hanh ((trinh cua) OR (tinh cua)) nhung ((cong tan) or (cong thanh)) toan cao*.