Perhaps you should try some spelling variations:
nghiem thuc » nghiem thuoc, nghiep thuc, nhiem thuc
thuc cong » thuoc cong, thu cong, chuc cong
van thanh » ban thanh
thu mach » thu sach, thuat mach, thu hoach
mach hoc » cach hoc, dich hoc, anh hoc
anh khoa » doanh khoa, hang khoa
khoa hoc » hoa hoc
van tuan » van quan, van ban, anh tuan
cong so » cong san, cong hoa
da thai » dao thai, do thai, ca thai
so anh » so sanh, so danh, do anh
hoc da » hoc dan, hoc dai, hoc dat

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu mach hoc tap, nghiem thuc cong so anh khoa hoc da thai ((van thanh) or (van tuan)) san~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu mach hoc tap, nghiem thuc cong so anh khoa hoc da thai ((van thanh) OR (van tuan)) san.
• Adding a wildcard symbol may retrieve word variants: thu mach hoc tap, nghiem thuc cong so anh khoa hoc da thai ((van thanh) or (van tuan)) san*.