Perhaps you should try some spelling variations:
hoc nganh » hoc nhanh
nganh hoa » thanh hoa, khanh hoa, danh hoa
mach hoc » cach hoc, anh hoc, bac hoc
dich hoc » sinh hoc, hinh hoc, tinh hoc
van phan » van phong, van thanh, luan phan
phan tao » nhan tao, phan tap, phan tan
cuu hoa » cuu khoa, cuu hoan, cau hoa
hai van » thai van, ha van, hai tan
ma hai » ta hai, va 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: tu ((mach hoc) OR (dich hoc)) tap, nghien cuu hoa hoc nganh hoa hoc ma hai van phan tao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((mach hoc) OR (dich hoc)) tap, nghien cuu hoa hoc nganh hoa hoc ma hai van phan tao".
• Adding a wildcard symbol may retrieve word variants: tu ((mach hoc) OR (dich hoc)) tap, nghien cuu hoa hoc nganh hoa hoc ma hai van phan tao*.