Perhaps you should try some spelling variations:
loai khoa » ngoai khoa, noi khoa, tai khoa
loai hoc » logic hoc, dai hoc, hoa hoc
tu sach » thu sach, su sach, te sach
hanh de » hanh ve, hanh kem
duc ban » duc tan, duc van, dua ban
ve cham » va cham, ve chat, vu cham
xuc ban » cuc ban, quoc ban, xuat ban
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
de cua » le cua, te cua, dieu cua
cua te » cua tu

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 ky nang ((loai hoc) OR (loai khoa)). hieu ve cham ((xuc ban) or (duc ban)) hanh de cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang ((loai hoc) OR (loai khoa)). hieu ve cham ((xuc ban) OR (duc ban)) hanh de cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang ((loai hoc) OR (loai khoa)). hieu ve cham ((xuc ban) or (duc ban)) hanh de cua te*".