Perhaps you should try some spelling variations:
hoc thanh » hoan thanh, hoc phan, ha thanh
hoc nhanh » hoc nganh, hoc phan
sach doi » sach hoi, sach moi, sach dao
cuu nang » chuc nang, cam nang, cuu van
cuu toan » cuu hoan, cua toan, huu toan
toan tai » toan tap, doanh tai, toan ban
tu sach » thu sach, su sach, te sach
doi tai » hoi tai, dai tai, doi tac
hoi cuu » hoi chu, hoi cua, ho cuu
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 tai, nghien cuu nang ((hoc thanh) or (hoc nhanh)) hoa hoc xa hoi cuu toan tai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach doi tai, nghien cuu nang ((hoc thanh) OR (hoc nhanh)) hoa hoc xa hoi cuu toan tai.
• Adding a wildcard symbol may retrieve word variants: tu sach doi tai, nghien cuu nang ((hoc thanh) or (hoc nhanh)) hoa hoc xa hoi cuu toan tai*.