Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hoc thieu » toc thieu, hoc hien
lang cong » dang cong, bang cong, hang cong
trinh va » trinh van, trinh vat, trinh vi
trinh ve » trinh he, trinh vi, trinh viet
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 ((trinh va) OR (trinh ve)) lang cong ((van toan) or (van tuan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - hanh ((trinh va) OR (trinh ve)) lang cong ((van toan) OR (van tuan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - hanh ((trinh va) OR (trinh ve)) lang cong ((van toan) or (van tuan)) cau".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - hanh ((trinh va) OR (trinh ve)) lang cong ((van toan) or (van tuan)) cau*.