Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hoc thieu » toc thieu, hoc hien
hang cong » dang cong, hang nong, bang cong
van ranh » van anh, van hanh, van manh
hoc hang » hoc hanh, hoc bang, hoc tang
cong van » cong vang, cong san, song van
toan ban » van 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 - ((canh tranh) or (van ranh)) hoc hang cong van ((toan tap) OR (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - ((canh tranh) OR (van ranh)) hoc hang cong van ((toan tap) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - ((canh tranh) or (van ranh)) hoc hang cong van ((toan tap) OR (toan ban))".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - ((canh tranh) or (van ranh)) hoc hang cong van ((toan tap) OR (toan ban))*.