Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
sach ly » sach y, sach lo, sach hay
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
hieu ve » hieu van
cao hoi » cau hoi, co hoi, cao hoc
sach ty » sach y, sach tu, sach thu
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) OR (sach ty)) nang cao 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) OR (sach ty)) nang cao 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) OR (sach ty)) nang cao hoi. ((hieu ve) or (hieu va)) cau luc va hanh vai cuu tre*".