Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hoc thieu » toc thieu, hoc hien
tung vat » tang vat, tung va, luong vat
dung vat » dung va, dong vat, dung dat
cong van » cong vang, song van, cong tan
cong san » cong tac
hang cau » hang dau, hang ca, nhung cau

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 ((tung vat) OR (dung vat)) dung ((cong van) OR (cong san)) hang cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - thanh ((tung vat) or (dung vat)) dung ((cong van) OR (cong san)) hang cau~".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - thanh ((tung vat) or (dung vat)) dung ((cong van) OR (cong san)) hang cau*.