Perhaps you should try some spelling variations:
nhanh khoa » nhan khoa, nganh khoa, hang khoa
hoc nhanh » hoc nganh, hoc phan
te sach » toc sach
doi tan » doi ban, doi tac, dai tan
cuu hoa » cuu khoa, cuu hoan, cau hoa
va phan » van phan, va phat, va phap
ma hoi » mai hoi, xa hoi, ma 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 ((doi tan) or (hoi dap)), nghien cuu hoa hoc nhanh khoa hoc ma hoi va phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((doi tan) OR (hoi dap)), nghien cuu hoa hoc nhanh khoa hoc ma hoi va phan tu.
• Adding a wildcard symbol may retrieve word variants: te sach ((doi tan) or (hoi dap)), nghien cuu hoa hoc nhanh khoa hoc ma hoi va phan tu*.