Perhaps you should try some spelling variations:
nganh khoa » nganh hoa, nganh khong, doanh khoa
hoc nganh » hoc nhanh
tran tuan » tran xuan, tran quang, tran thanh
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
khoa hoc » hoa hoc
tan tuan » than tuan, van tuan, tan tran
xa thai » ca thai, a thai, da thai
hoc xa » hoc ma

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 xa thai ((tan tuan) OR (tran tuan)) 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 xa thai ((tan tuan) OR (tran tuan)) san".
• Adding a wildcard symbol may retrieve word variants: thu tinh hoc tap, nghien cuu cong hoc nganh khoa hoc xa thai ((tan tuan) OR (tran tuan)) san*.