Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
trinh cua » tinh cua, trinh luat, trinh quan
tu sach » thu sach, su sach, te sach
duc van » duc va, duc tan, duc manh
xuc ban » duc ban, cuc ban, quoc ban
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
nang co » nang doc, nang noi, nang hoc
ve cac » va cac, vien cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach y ((nang cao) or (nang co)) hai. hieu ve cac ((xuc ban) or (duc van)) hanh trinh cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y ((nang cao) OR (nang co)) hai. hieu ve cac ((xuc ban) OR (duc van)) hanh trinh cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach y ((nang cao) or (nang co)) hai. hieu ve cac ((xuc ban) or (duc van)) hanh trinh cua tre*.