Perhaps you should try some spelling variations:
tran thanh » ban thanh, van thanh, quan thanh
hoc nganh » hoc nhanh
thu tinh » thue tinh, thuy tinh, thuc tinh
tinh hoc » sinh hoc, tin hoc, hinh hoc
cuu cong » cua cong, thu cong, cac cong
cong hoc » dong hoc, cong hoa, cong coc
hai tran » thai tran, hai tan, ha tran
xua hai » qua hai, cua hai, xa hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu tinh hoc tap, nghien cuu cong hoc nganh ((khoa hoc) OR (hoa hoc)) xua hai tran thanh san~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu tinh hoc tap, nghien cuu cong hoc nganh ((khoa hoc) OR (hoa hoc)) xua hai tran thanh san".
• Adding a wildcard symbol may retrieve word variants: thu tinh hoc tap, nghien cuu cong hoc nganh ((khoa hoc) OR (hoa hoc)) xua hai tran thanh san*.