Perhaps you should try some spelling variations:
hien hanh » dieu hanh
bieu hien » dieu hien, dieu khien, bien phien
sach ky » sac ky, sach y, sach kem
sach ty » sach y, sach tu, sach thu
hanh xu » hanh tu, hanh sua, hanh cua
tinh va » tich va, trinh van, trinh vat
cuu tre » cua tre, cau tren, cau treo
xu may » xe may, tu may
va cuu » va cau, va chu, va huu
x hoi » xa hoi, o hoi, 5 hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sach ky) OR (sach ty)) nang ((x hoi) or (x ho)). bieu hien hanh xu may tinh va cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ky) OR (sach ty)) nang ((x hoi) OR (x ho)). bieu hien hanh xu may tinh va cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ky) OR (sach ty)) nang ((x hoi) or (x ho)). bieu hien hanh xu may tinh va cuu tre".
• Adding a wildcard symbol may retrieve word variants: te ((sach ky) OR (sach ty)) nang ((x hoi) or (x ho)). bieu hien hanh xu may tinh va cuu tre*.