Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
thong cong » trong cong, tong cong, thong thong
hoc thieu » toc thieu, hoc hien
tranh cua » doanh cua, manh cua
tang cua » mang cua, hang cua, tang luan
cong dan » cong san, cong tan, huong dan
than cao » toan cao, thai cao, than sao
than cap » khan cap, thanh lap, thanh cac

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 ((tranh cua) OR (tang cua)) thong cong dan ((than cao) OR (than cap))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - hanh ((tranh cua) or (tang cua)) thong cong dan ((than cao) OR (than cap))~".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - hanh ((tranh cua) or (tang cua)) thong cong dan ((than cao) OR (than cap))*.