Perhaps you should try some spelling variations:
nuoc giai » nuoc ngoai, quoc gia, nuoc thai
van hanh » van thanh, van anh, van ban
ban hanh » ban hang
giai ky » giai ke, giang ky
nang xa » nang x, lang xa, nang ma
cuu tre » cua tre, cau tren, cau treo
ve cau » va cau, ve cac, le cau
ke cau » ket cau
de cuu » de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: nuoc giai ky nang xa hoi. hieu ((ve cau) or (ke cau)) truc ((van hanh) OR (ban hanh)) de cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nuoc giai ky nang xa hoi. hieu ((ve cau) OR (ke cau)) truc ((van hanh) OR (ban hanh)) de cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "nuoc giai ky nang xa hoi. hieu ((ve cau) or (ke cau)) truc ((van hanh) OR (ban hanh)) de cuu tre".
• Adding a wildcard symbol may retrieve word variants: nuoc giai ky nang xa hoi. hieu ((ve cau) or (ke cau)) truc ((van hanh) OR (ban hanh)) de cuu tre*.