Perhaps you should try some spelling variations:
thuat canh » thuat lanh, thuat cong, thuat chan
thuat san » thuat toan, thuat song, thuat lanh
dan khoa » dang khoa, da khoa, san khoa
khoa hoc » hoa hoc
van nhan » van phan, van thanh, danh nhan
nhan dan » phan dau, gian dan, nhan tai
cuu mon » cuu mo, cuu mot, cuu cong
mon hoc » toan hoc, dong hoc
hoi van » hoi va, hoi dan, hai van
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thuat canh) or (thuat san)) hoc tap, nghien cuu mon hoc dan khoa hoc ma hoi van nhan dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuat canh) OR (thuat san)) hoc tap, nghien cuu mon hoc dan khoa hoc ma hoi van nhan dan.
• Adding a wildcard symbol may retrieve word variants: ((thuat canh) or (thuat san)) hoc tap, nghien cuu mon hoc dan khoa hoc ma hoi van nhan dan*.