Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hoc thieu » toc thieu, hoc hien
trinh suc » trinh duc, trinh muc, trinh thuc
canh cong » hanh cong, anh cong, canh cung
trinh su » trinh tu, trinh san, trinh cau
cong dan » cong san, cong tan, huong dan
toan cao » toan ban
toan tap » 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 - hanh ((trinh suc) OR (trinh su)) canh cong dan ((toan cao) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - hanh ((trinh suc) OR (trinh su)) canh cong dan ((toan cao) OR (toan tap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - hanh ((trinh suc) OR (trinh su)) canh cong dan ((toan cao) or (toan tap))".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - hanh ((trinh suc) OR (trinh su)) canh cong dan ((toan cao) or (toan tap))*.