Perhaps you should try some spelling variations:
nghiep thuc » nghiem thuc, nghiem thuoc, nghi thuc
thuat sach » thuat lanh, thuat san
nghe thuc » nghe thu, nghe thuat
sach hoc » cach hoc, sach hoi, mach hoc
dong hoc » dong co, dong luc
hoc hang » hoc hanh, hoc bang, hoc tang
hang hoa » hang khoa, thanh hoa, hang va
van nhan » van phan, van thanh, danh nhan
nhan dan » phan dau, gian dan, nhan tai
hoi van » hoi va, hoi dan, hai van
hoc xa » hoc ma

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, ((nghiep thuc) or (nghe thuc)) dong hoc hang hoa hoc xa hoi van nhan dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach hoc tap, ((nghiep thuc) OR (nghe thuc)) dong hoc hang hoa hoc xa hoi van nhan dan.
• Adding a wildcard symbol may retrieve word variants: thuat sach hoc tap, ((nghiep thuc) or (nghe thuc)) dong hoc hang hoa hoc xa hoi van nhan dan*.