Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
hieu van » hieu va, thien van, lieu va
van hanh » van thanh, ban hanh, van anh
sach ty » sach y, sach tu, sach thu
van hac » van hoc, van ha, van hai
hac duy » pham duy, phan duy
duy van » duy vat, dung van
vi cua » vai cua, di cua
cua te » cua tu
x hoi » o hoi, x ho, 5 hoi

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 ty xang ((x hoi) OR (xa hoi)). hieu van hac duy van hanh vi cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach ty xang ((x hoi) OR (xa hoi)). hieu van hac duy van hanh vi cua te".
• Adding a wildcard symbol may retrieve word variants: thuat sach ty xang ((x hoi) OR (xa hoi)). hieu van hac duy van hanh vi cua te*.