Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hoc thieu » toc thieu, hoc hien
trinh vat » trinh van, trinh luat, sinh vat
dung cong » dung trong
tranh va » tranh van, trang va, trinh va
van toan » van tan, van thanh, manh toan
van tuan » van quan, van ban, anh tuan

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 ((tranh va) or (trinh vat)) dung cong ((van toan) or (van tuan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - hanh ((tranh va) OR (trinh vat)) dung cong ((van toan) OR (van tuan)) cau.
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - hanh ((tranh va) or (trinh vat)) dung cong ((van toan) or (van tuan)) cau*.