Perhaps you should try some spelling variations:
thuat cach » thuat sach, thuat mach, thuat tach
thuat canh » thuat lanh, thuat cong, thuat san
nganh khoa » nganh hoa, nganh khong, doanh khoa
goc nganh » hoc nganh, hoc nhanh, cac nganh
khoa hoc » hoa hoc
mai khoa » tai khoa, may khoa, dai khoa
khoa dan » khoa dang, hoa dan, khoa can
cuu mot » cua mot, cuu mo, huu mot
hoc mai » hoc ma, hoc dai, hoc bai
dan van » dang van, doan van, dao van
van tai » von tai, van tuan

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thuat cach) or (thuat canh)) hoc tap, nghien cuu mot goc nganh khoa hoc mai khoa dan van tai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuat cach) OR (thuat canh)) hoc tap, nghien cuu mot goc nganh khoa hoc mai khoa dan van tai*.