Perhaps you should try some spelling variations:
ganh nang » anh nang, nganh nong, van nang
nang thuc » dang thuoc, nhanh thuc, trang thuc
mach hoc » cach hoc, dich hoc, anh hoc
sach hoi » sach doi, sach moi, cach thoi
hoc ganh » hoc nganh, hoc anh, hoc hanh
van nhan » van phan, van thanh, danh nhan
nhan van » nhan dan, nhan va, phan van
thuc xa » thuc xay, tuc xa, thuc va
hoi van » hoi va, hoi dan, hai van
mo hoc » mon hoc, co hoc

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 (sach hoi)) tap, nghien cuu mo hoc ganh nang thuc xa hoi van nhan van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((mach hoc) OR (sach hoi)) tap, nghien cuu mo hoc ganh nang thuc xa hoi van nhan van.
• Adding a wildcard symbol may retrieve word variants: tu ((mach hoc) or (sach hoi)) tap, nghien cuu mo hoc ganh nang thuc xa hoi van nhan van*.