Perhaps you should try some spelling variations:
khoan khau » khoanh khac, khoa kham, khoa phau
khau thong » khau thuong, khap thong, khau tong
phan thong » phan thuong, phan hong, phan tong
thuc bach » truc bach, thuc cach, thuoc sach
cach tri » cach thoi, cac tro, cach noi
tri thuc » tri tue
thuc cac » thuc cach, tuc cac, phuc cac
sinh tri » dinh tri, minh tri, tinh tri
bach hoa » bach khoa, bach ha, cach hoan
hoa phan » hoa dan, co phan
tu cach » tu cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tu cach tri thuc cac khoan khau thong ) or ( hoc sinh tri thuc bach hoa phan thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu cach tri thuc cac khoan khau thong ) OR ( hoc sinh tri thuc bach hoa phan thong )).
• Adding a wildcard symbol may retrieve word variants: (( tu cach tri thuc cac khoan khau thong ) or ( hoc sinh tri thuc bach hoa phan thong ))*.