Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hoc thieu » toc thieu, hoc hien
trinh van » trinh han, trinh quan, trinh toan
trinh va » trinh vat, trinh ve, trinh vi
cong bai » cuong bai, cong hai, cung bai
bai toan » bai tap
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 - hanh ((trinh va) or (trinh van)) trong cong bai toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - hanh ((trinh va) OR (trinh van)) trong cong bai toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - hanh ((trinh va) or (trinh van)) trong cong bai toan ban*.