Perhaps you should try some spelling variations:
thuat lanh » thuat lap, thuat san
lanh tren » lang tren, lanh truyen, doanh tren
tren thuc » trien thuc, tron thuc, trinh thuc
thuc dung » thuoc dung, thuy dung, tuc dung
dung khoa » dung cho
hanh khoa » hang khoa, anh khoa, hanh hoa
dot trong » ro trong
khoa dot » khoa doi, khoa duoc, khoan mot
khoa he » hoa he, khoa hoc, khong he

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( thuat lanh tren thuc dung khoa he thong ) or ( thuat lanh tren thuc hanh khoa dot trong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( thuat lanh tren thuc dung khoa he thong ) OR ( thuat lanh tren thuc hanh khoa dot trong )).
• Adding a wildcard symbol may retrieve word variants: (( thuat lanh tren thuc dung khoa he thong ) or ( thuat lanh tren thuc hanh khoa dot trong ))*.