Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
nghien thu » nghiem thuc, nghiep thuc, nghien cuu
nganh cong » nhanh chong, thanh cong
cong thuoc » cong thuc, dong thuoc, long thuoc
coc nganh » hoc nganh, cac nganh, chuc nganh
sach hoc » cach hoc, sach hoi, mach hoc
cong coc » cong cuoc, cong cac, cong co
thuoc va » thuc va, thuoc ma, thuong va
vat nhan » van nhan, hat nhan, va nhan
sat nhan » hat nhan, sat phan, ca nhan
va hoc » van hoc

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 thu cong coc nganh cong thuoc va hoc ((vat nhan) or (sat nhan)) tai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach hoc tap, nghien thu cong coc nganh cong thuoc va hoc ((vat nhan) OR (sat nhan)) tai*.