Perhaps you should try some spelling variations:
nghien cua » nghien cuu, nghiep cua, nghiep vua
hang khoa » dung khoa
cach hoc » cach thuc, cach thoi, dich hoc
cong coc » cong cuoc, cong cac, cong co
coc hang » hoc hang, oc hang, moc hoang
khoa hoc » hoa hoc
thi danh » thai danh, thi anh, thi oanh
thi hanh » thi thanh
te cach » ve cach, te sach, tu cach
nhan va » nhan tai, nhan dan, nhan tao
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: te cach hoc tap, nghien cua cong coc hang khoa hoc xa ((thi danh) OR (thi hanh)) nhan va~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te cach hoc tap, nghien cua cong coc hang khoa hoc xa ((thi danh) OR (thi hanh)) nhan va".
• Adding a wildcard symbol may retrieve word variants: te cach hoc tap, nghien cua cong coc hang khoa hoc xa ((thi danh) OR (thi hanh)) nhan va*.