Perhaps you should try some spelling variations:
hien hanh » dieu hanh
trinh vat » trinh van, trinh luat, sinh vat
bieu hien » dieu hien, dieu khien, bien phien
phuc may » hoc may, chua may, truc may
vat cuu » vat cua
xuc may » xuc hay, truc may
sach ky » sac ky, sach y, sach kem
sach ty » sach y, sach tu, sach thu
cuu tre » cua tre, cau tren, cau treo
x hoi » xa hoi, o hoi, x ho

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