Perhaps you should try some spelling variations:
thuc xay » thuc day, tuc xay, thuat xay
dung ban » dung san, dung dan, dong ban
cao hoi » cau hoi, co hoi, cao hoc
ban cua » ban quan
cua tre » cua te, cuu tre, cua triet
sac ky » cac ky
ve nam » he nam, le nam, te nam
va nam » van nam, ha nam, va nay

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

• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sac ky) OR (sai ky)) nang cao hoi. hieu ((ve nam) OR (va nam)) thuc xay dung ban cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sac ky) or (sai ky)) nang cao hoi. hieu ((ve nam) OR (va nam)) thuc xay dung ban cua tre~".
• Adding a wildcard symbol may retrieve word variants: te ((sac ky) or (sai ky)) nang cao hoi. hieu ((ve nam) OR (va nam)) thuc xay dung ban cua tre*.