Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
cham duc » pham duc, cham soc, pham duy
hieu va » lieu va, hieu qua
van anh » van thanh, tuan anh, van minh
duc van » duc va, duc tan, duc manh
tu sach » thu sach, su sach, tu cach
hieu ve » hieu van
te sach » toc sach
anh ke » anh ve, anh le, hanh kem
ke cau » ket cau
x hoi » xa hoi, o hoi, x ho

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 (te sach)) ky nang x hoi. ((hieu ve) or (hieu va)) cham duc van anh ke cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ky nang x hoi. ((hieu ve) OR (hieu va)) cham duc van anh ke cau tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (te sach)) ky nang x hoi. ((hieu ve) or (hieu va)) cham duc van anh ke cau tren".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (te sach)) ky nang x hoi. ((hieu ve) or (hieu va)) cham duc van anh ke cau tren*.