Perhaps you should try some spelling variations:
hanh keo » hanh kem, banh keo, hanh theo
van hanh » van thanh, ban hanh, van anh
cam luoc » cam xuc, cam lo, dai luoc
te sach » toc sach
sach ky » sac ky, sach y, sach ty
keo cua » keo sua, kho cua, khoe cua
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
o hai » co hai, so hai, o lai
o hoi » co hoi, o hoc, o hoa

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 ((o hoi) OR (o hai)). hieu ve ((cam luoc) or (tom luoc)) van hanh keo cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang ((o hoi) OR (o hai)). hieu ve ((cam luoc) OR (tom luoc)) van hanh keo cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang ((o hoi) OR (o hai)). hieu ve ((cam luoc) or (tom luoc)) van hanh keo cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ((o hoi) OR (o hai)). hieu ve ((cam luoc) or (tom luoc)) van hanh keo cua tre*.