Perhaps you should try some spelling variations:
nghien chuc » nghien cuu, nghiem thuc, nghiep thuc
luc khanh » duc khanh, quoc khanh, phuc khanh
khanh hoa » thanh hoa, hang hoa
sach doi » sach hoi, sach moi, sach dao
tu sach » thu sach, su sach, te sach
doi tac » dong tac
hoi cau » hoc cau, hoa cau, hoi cac
hoi chu » hoi chuc
nhan va » nhan tai, nhan dan, nhan tao
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: tu sach doi tac, nghien chuc nang luc khanh hoa hoc xa ((hoi cau) OR (hoi chu)) nhan va~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach doi tac, nghien chuc nang luc khanh hoa hoc xa ((hoi cau) OR (hoi chu)) nhan va".
• Adding a wildcard symbol may retrieve word variants: tu sach doi tac, nghien chuc nang luc khanh hoa hoc xa ((hoi cau) OR (hoi chu)) nhan va*.