Perhaps you should try some spelling variations:
nghiem thuc » nghiem thuoc, nghiep thuc, nhiem thuc
thuc cong » thuoc cong, thu cong, chuc cong
toc sach » hoc sach, doc sach, thuoc sach
cong toc » cong tac, cong coc, cong uoc
san khoa » toan khoa, hang khoa, da khoa
khoa hoc » hoa hoc
van gian » van giang, dan gian, van giao
gian dan » gian lang
hoc anh » hoc nganh, hoc nhanh, ngoc anh
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: ((toc sach) or (hoc anh)) hoc tap, nghiem thuc cong toc san khoa hoc xa hoi van gian dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (hoc anh)) hoc tap, nghiem thuc cong toc san khoa hoc xa hoi van gian dan.
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (hoc anh)) hoc tap, nghiem thuc cong toc san khoa hoc xa hoi van gian dan*.