Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
nganh dong » nganh cong, nhanh dong, nganh nong
coc nganh » hoc nganh, cac nganh, chuc nganh
dong thuc » dong thuoc, duong thuc, cong thuc
sach hoc » cach hoc, sach hoi, mach hoc
cuu cong » cua cong, thu cong, cac cong
cong coc » cong cuoc, cong cac, cong co
nhan tai » van tai, toan tai
hang tai » hang va, dung tai
thuc va » thuc vat, thuc dan, thuc day
hoi van » hoi va, hoi dan, hai van
va hoi » xa hoi, va hoc, va 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 sach hoc tap, nghien cuu cong coc nganh dong thuc va hoi van ((nhan tai) or (hang tai))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach hoc tap, nghien cuu cong coc nganh dong thuc va hoi van ((nhan tai) OR (hang tai))*.