Perhaps you should try some spelling variations:
lieu van » lieu va, hieu van, sieu van
van hanh » van thanh, van anh, van ban
ban hanh » ban hang
tu sach » thu sach, su sach, te sach
ky tang » ky nang, kho tang, ky trong
ky dang » ky nang, ky danh
nam mua » nam cua, nam qua, nam xua
cua tre » cua te, cuu tre, cua triet
di cua » dai cua, doi cua, 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: tu sach ((ky tang) or (ky dang)) xa hoi. lieu van nam mua ((van hanh) OR (ban hanh)) di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ky tang) OR (ky dang)) xa hoi. lieu van nam mua ((van hanh) OR (ban hanh)) di cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ky tang) or (ky dang)) xa hoi. lieu van nam mua ((van hanh) OR (ban hanh)) di cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ky tang) or (ky dang)) xa hoi. lieu van nam mua ((van hanh) OR (ban hanh)) di cua tre*.