Perhaps you should try some spelling variations:
cay tren » chay tren, ca tren, cau tren
thu sach » thuat sach, thuoc sach, thu hoach
cua cay » cua cac
dan cua » dan ca, ban cua, dai cua
tu sach » su sach, te sach, tu cach
nang co » nang cao, nang doc, nang noi
co hoi » co hoc, co loi
tuc va » thuc va, truc va, duc va
va cam » va cham, va cac, va cao

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) or (thu sach)) ky nang co hoi. lieu va cam ((tuc va) OR (tuc xa)) dan cua cay tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ky nang co hoi. lieu va cam ((tuc va) OR (tuc xa)) dan cua cay tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (thu sach)) ky nang co hoi. lieu va cam ((tuc va) OR (tuc xa)) dan cua cay tren".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) ky nang co hoi. lieu va cam ((tuc va) OR (tuc xa)) dan cua cay tren*.