Perhaps you should try some spelling variations:
trinh dien » tinh dien, trinh tin
hieu hien » bieu hien, chieu chien, dieu khien
dieu hien » dieu khien, dieu kien, bieu hien
dien cuc » dien tu, dieu cua, vien cac
te sach » toc sach
tuc xay » thuc xay, tuc xa, tu xay
tuc may » truc may, tu may, phuc may
sach ky » sac ky, sach y, sach ty
cuc tre » duc tre, cua tre, cuu tre
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 nang x hoi. ((hieu hien) OR (dieu hien)) cac ((tuc may) or (tuc xay)) trinh dien cuc tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang x hoi. ((hieu hien) OR (dieu hien)) cac ((tuc may) OR (tuc xay)) trinh dien cuc tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang x hoi. ((hieu hien) OR (dieu hien)) cac ((tuc may) or (tuc xay)) trinh dien cuc tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang x hoi. ((hieu hien) OR (dieu hien)) cac ((tuc may) or (tuc xay)) trinh dien cuc tre*.