Perhaps you should try some spelling variations:
khoan kham » khoa kham, khoanh khac, khoan cam
kham thong » khap thong, khau thong, pham thuong
nhan trong » nhuan trong, nhat trong, nhin trong
hoach tri » hoach toi, hoach hoi, hoach thu
thuc cach » thuoc sach, truoc cach, thuc hanh
sach tri » sach tai, sach tren, sach truc
tri thuc » tri tue
thuc cac » tuc cac, phuc cac, thac cac
cach cho » cach thoi, danh cho, cap cho
cho nhan » cho phan, cho nha, cho thanh
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 tri thuc cac khoan kham thong ) or ( thu hoach tri thuc cach cho nhan trong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu sach tri thuc cac khoan kham thong ) OR ( thu hoach tri thuc cach cho nhan trong )).
• Adding a wildcard symbol may retrieve word variants: (( tu sach tri thuc cac khoan kham thong ) or ( thu hoach tri thuc cach cho nhan trong ))*.