Perhaps you should try some spelling variations:
thuat dan » thuat ban, thuat dam, thuat dao
sach nhan » sach han, sach ngan, cach nhanh
thuat san » thuat toan, thuat song, thuat lanh
thanh ky » hanh ky, than ky, thanh tay
so dinh » do dinh, co dinh, so sinh
dan hoc » van hoc, dan toc, dai hoc
san hoc » van hoc, san ho, sinh hoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( so dinh thanh ky thuat dan hoc ) or ( so ((sach nhan) or (sach nha)) ky thuat san hoc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( so dinh thanh ky thuat dan hoc ) OR ( so ((sach nhan) OR (sach nha)) ky thuat san hoc )).
• Adding a wildcard symbol may retrieve word variants: (( so dinh thanh ky thuat dan hoc ) or ( so ((sach nhan) or (sach nha)) ky thuat san hoc ))*.