Perhaps you should try some spelling variations:
thep xanh » heo xanh, thep bang, thep hinh
xanh tham » sach tham, van tham, xanh lam
tham hinh » tham dinh, thuat hinh, thai thinh
hinh hoc » sinh hoc, tin hoc, benh hoc
danh nam » dan nam, dinh nam, dang nam
dinh cac » dinh chuc, dinh chau, dinh van
cach » sach

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: (( thep xanh tham hinh hoc. ) OR ( hop danh nam ((dinh cac) OR (tinh cach)). ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( thep xanh tham hinh hoc. ) or ( hop danh nam ((dinh cac) OR (tinh cach)). ))~".
• Adding a wildcard symbol may retrieve word variants: (( thep xanh tham hinh hoc. ) or ( hop danh nam ((dinh cac) OR (tinh cach)). ))*.