Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
hanh vai » hanh vi, hanh va, hanh tai
sach ly » sach y, sach lo, sach ty
vai cuu » vai cua
va hanh » van hanh, va thanh, va danh
cau luc » cau truc, cau phuc
hieu va » lieu va, hieu qua
cuu tre » cua tre, cau tren, cau treo
cao hoi » cau hoi, cao hoc, tao hoi
hieu ve » hieu van
ly nang » ky nang, ly hang, ly vang
co hoi » co hoc, co loi
luc va » duc va, tuc va, loc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach ly nang ((cao hoi) OR (co hoi)). ((hieu ve) or (hieu va)) cau luc va hanh vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ly nang ((cao hoi) OR (co hoi)). ((hieu ve) OR (hieu va)) cau luc va hanh vai cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach ly nang ((cao hoi) OR (co hoi)). ((hieu ve) or (hieu va)) cau luc va hanh vai cuu tre*".