Perhaps you should try some spelling variations:
kham thong » khap thong, khau thong, pham thuong
nguoi sach » nguoi san, nuoc sach
thai truc » thai thuc, thai tuc, thi truc
bach khoa » anh khoa
khoa kham » kho khan, khoa than
thau xay » thuat xay, tu xay, phan xay
xay thai » lay thai, tay thai, xa thai
sach tri » sach tai, sach tren, sach truc
tri thuc » tri tue
khoa hoc » hoa hoc
thuc da » thuc dan, thuc day, thuc dia
thuong » truong, huong, phuong

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( thau xay thai truc bach khoa kham thong ) or ( nguoi sach tri thuc da khoa hoc thuong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( thau xay thai truc bach khoa kham thong ) OR ( nguoi sach tri thuc da khoa hoc thuong )).
• Adding a wildcard symbol may retrieve word variants: (( thau xay thai truc bach khoa kham thong ) or ( nguoi sach tri thuc da khoa hoc thuong ))*.