Perhaps you should try some spelling variations:
nhanh chong » thanh cong, khanh phong
hoan thanh » hoang thanh, ban thanh, van thanh
luc nhanh » luc nhan, luc nganh, luc canh
chong hoc » chung hoc, chong doc, thong hoc
hoi thanh » hoc thanh, hai thanh, hoa thanh
sach hoi » sach doi, sach moi, cach thoi
cuu tong » cuu cong, cuu tinh, huu tung
tong luc » dong luc, tong cuc, truong luc
toan dan » toan ban, toan dam, toan dai
tu sach » thu sach, su sach, te sach
hoi tap » hoi dap, hoc tap, hoi tai
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 hoi tap, nghien cuu tong luc nhanh chong hoc xa ((hoi thanh) or (hoan thanh)) toan dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach hoi tap, nghien cuu tong luc nhanh chong hoc xa ((hoi thanh) OR (hoan thanh)) toan dan.
• Adding a wildcard symbol may retrieve word variants: tu sach hoi tap, nghien cuu tong luc nhanh chong hoc xa ((hoi thanh) or (hoan thanh)) toan dan*.