Perhaps you should try some spelling variations:
nganh trung » thanh trung, manh trung, danh trung
nghien thu » nghiem thuc, nghiep thuc, nghien cuu
hoc nganh » hoc nhanh
trung hoc » trung quoc
bai thanh » ban thanh, tai thanh, mai thanh
toc sach » hoc sach, doc sach, thuoc sach
thu dong » thuy dong, tu dong, thu cong
dong hoc » dong co, dong luc
hoc bai » hoc dai, hoc giai
hoc xa » hoc ma
xa hoc » xa hoi, va hoc, xa hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) OR (toc sach)) hoc tap, nghien thu dong hoc nganh trung hoc xa hoc bai thanh san~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) OR (toc sach)) hoc tap, nghien thu dong hoc nganh trung hoc xa hoc bai thanh san".
• Adding a wildcard symbol may retrieve word variants: ((te sach) OR (toc sach)) hoc tap, nghien thu dong hoc nganh trung hoc xa hoc bai thanh san*.