Perhaps you should try some spelling variations:
nganh khoa » nganh hoa, nganh khong, doanh khoa
hoc nganh » hoc nhanh
sach doi » sach hoi, sach moi, sach bai
sach dao » lanh dao
cuu cong » cua cong, thu cong, cac cong
cong hoc » dong hoc, cong hoa, cong coc
khoa hoc » hoa hoc
cac nhan » ca nhan, cac nha, cam nhan
voi cac » loi cach
nhan va » nhan tai, nhan dan, nhan tao
ma voi » ba voi, da voi, ma moi

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach doi) OR (sach dao)) tap, nghien cuu cong hoc nganh khoa hoc ma voi cac nhan va~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach doi) OR (sach dao)) tap, nghien cuu cong hoc nganh khoa hoc ma voi cac nhan va".
• Adding a wildcard symbol may retrieve word variants: tu ((sach doi) OR (sach dao)) tap, nghien cuu cong hoc nganh khoa hoc ma voi cac nhan va*.