Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
trinh toan » tinh toan, thanh toan, trinh han
thang long » thanh cong
hoc thieu » toc thieu, hoc hien
trinh van » trinh han, trinh quan, dinh van
trinh vat » trinh luat, sinh vat, trinh han
long tich » long tinh, long lich, luong dich
tich van » tich va, dinh van, tich bao

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - thanh ((((trinh van) OR (trinh toan))) OR (trinh vat)) thang long tich van ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - thanh ((((trinh van) OR (trinh toan))) or (trinh vat)) thang long tich van ban~".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - thanh ((((trinh van) OR (trinh toan))) or (trinh vat)) thang long tich van ban*.