Perhaps you should try some spelling variations:
sach truc » cach thuc, sach tren, sach thu
kinh thuc » sinh thuc, dinh thuc, hinh thuc
truc hanh » thuc hanh, tuc hanh, thuc thanh
khoan hoi » khoan nhoi, khoa hoi, khoa hoc
hoi thong » hoi thuong, hoi trong, hoa thong
thuc anh » thuc hanh, thuy anh, thu anh
anh khoa » doanh khoa, hang khoa
hanh cac » hang cac, hanh cat, nhanh cay
vu sach » vu bach, su sach, vu khach
khoa he » hoa he, khoa hoc, khong he
tu sach » thu sach, su sach, te sach

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (( vu sach kinh thuc anh khoa he thong ) or ( tu sach truc hanh cac khoan hoi thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( vu sach kinh thuc anh khoa he thong ) OR ( tu sach truc hanh cac khoan hoi thong ))*.