Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hoc thieu » toc thieu, hoc hien
va phuong » va thuong, cac phuong
hanh han » hanh nhan, hanh phan, hanh san
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
nhan tai » hang tai, van tai, toan tai
han tap » han tai, toan tap, nhan tao
han va » hang va, hanh va, nhan va

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 han va phuong ((cong dan) or (cong tan)) ((han tap) OR (nhan tai))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - hanh han va phuong ((cong dan) OR (cong tan)) ((han tap) OR (nhan tai)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - hanh han va phuong ((cong dan) or (cong tan)) ((han tap) OR (nhan tai))".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - hanh han va phuong ((cong dan) or (cong tan)) ((han tap) OR (nhan tai))*.