Perhaps you should try some spelling variations:
cuu luong » cuu long, cu luong, cuu tuong
luong suc » luong duc, luong su, duong suc
manh khoa » anh khoa, xanh khoa, doanh khoa
van thanh » ban thanh
mach hoc » cach hoc, dich hoc, anh hoc
khoa hoc » hoa hoc
van tuan » van quan, van ban, anh tuan
tu mach » tu cach, tu manh, tu hach
hoc xua » hoc cua, hoc xa, hoc lua
xua hai » qua hai, cua hai, xa hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu mach hoc tap, nghien cuu luong suc manh khoa hoc xua hai ((van thanh) or (van tuan)) van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu mach hoc tap, nghien cuu luong suc manh khoa hoc xua hai ((van thanh) OR (van tuan)) van.
• Adding a wildcard symbol may retrieve word variants: tu mach hoc tap, nghien cuu luong suc manh khoa hoc xua hai ((van thanh) or (van tuan)) van*.