Perhaps you should try some spelling variations:
thuat lanh » thuat lap, 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
lanh tren » lang tren, lanh truyen, doanh tren
mach khoa » bach khoa, anh khoa, may khoa
khoa kham » kho khan, khoa than
kham tong » khau tong, pham trong, khac trong
khoi han » hoi han, khoi can, khoa than
tren tim » trien tin, trinh tim, trong tim
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: (( tu sach thuc thuc cach khoi han tong ) or ( thuat lanh tren tim mach khoa kham tong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu sach thuc thuc cach khoi han tong ) OR ( thuat lanh tren tim mach khoa kham tong )).
• Adding a wildcard symbol may retrieve word variants: (( tu sach thuc thuc cach khoi han tong ) or ( thuat lanh tren tim mach khoa kham tong ))*.