Perhaps you should try some spelling variations:
sach trinh » sach tranh, hanh trinh, sach kinh
thuat sach » thuat lanh, thuat san
sach thuc » cach thuc, sach thu, sach thue
thuc thuc » hoc thuc
thuc cach » thuoc sach, truoc cach, thuc hanh
cach khoi » cach thoi, cac khoi, cac thoi
trinh tim » trinh tin, trinh tam, trinh kiem
khoa kham » kho khan, khoa than
kham tong » khau tong, pham trong, khac trong
khoi can » khoa can, khoi nang, hoc can
can tong » han tong, ban tong, can dong
anh khoa » doanh khoa, hang khoa
tu sach » thu sach, su sach, te sach
tim anh » tim hanh, tam anh, kim anh

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 thuc thuc cach khoi can tong ) or ( thuat sach trinh tim anh khoa kham tong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu sach thuc thuc cach khoi can tong ) OR ( thuat sach trinh tim anh khoa kham tong )).
• Adding a wildcard symbol may retrieve word variants: (( tu sach thuc thuc cach khoi can tong ) or ( thuat sach trinh tim anh khoa kham tong ))*.