Perhaps you should try some spelling variations:
nghien cua » nghien cuu, nghiep cua, nghiep vua
chuc khanh » chuc hanh, phuc khanh, chuoc thanh
cong chuc » cong thuc, cong cu, cong cua
khanh hoa » thanh hoa, hang hoa
thu sach » tu sach, thuat sach, thuoc sach
van tuan » van quan, van ban, anh tuan
tuan tai » toan tai, quan tai, tan tai
doi dap » hoi dap, do dap, doi dam
doi dau » doan dau
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: thu sach ((doi dap) or (doi dau)), nghien cua cong chuc khanh hoa hoc xa hoi van tuan tai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((doi dap) OR (doi dau)), nghien cua cong chuc khanh hoa hoc xa hoi van tuan tai.
• Adding a wildcard symbol may retrieve word variants: thu sach ((doi dap) or (doi dau)), nghien cua cong chuc khanh hoa hoc xa hoi van tuan tai*.