Perhaps you should try some spelling variations:
thuong dong » phuong dong, tuong dong, chuong dong
thieu xanh » chieu xanh, hieu manh, thien danh
thien anh » thien danh, tien anh, thien thanh
than tinh » thanh tinh, than kinh, thai tinh
dong dan » dong danh, duong dan, dong san
than tap » toan tap, han tap, than cap
phan tap » phan lap, han tap, pha tap
tinh va » tich va, trinh van, trinh vat

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) or (thien anh)) - than tinh va thuong dong dan ((than tap) OR (phan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (thien anh)) - than tinh va thuong dong dan ((than tap) OR (phan tap))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) or (thien anh)) - than tinh va thuong dong dan ((than tap) OR (phan tap))*".