Perhaps you should try some spelling variations:
thu nang » thi nang, thu hang, thu bang
thanh va » thanh van, hanh va, thanh ha
va thanh » gia thanh, ban thanh, va tinh
sach thu » sach thue, sach thieu, sach tham
tu sach » thu sach, su sach, te sach
va cua » va chua, via cua, ca cua
cua te » cua tu
ve cac » vien cac
ve cam » ve cham, va cam, ve cai
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 thu nang x hoi. hieu ((((ve cam) OR (ve cac))) or (va cac)) duc va thanh va cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach thu nang x hoi. hieu ((((ve cam) OR (ve cac))) OR (va cac)) duc va thanh va cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach thu nang x hoi. hieu ((((ve cam) OR (ve cac))) or (va cac)) duc va thanh va cua te".
• Adding a wildcard symbol may retrieve word variants: tu sach thu nang x hoi. hieu ((((ve cam) OR (ve cac))) or (va cac)) duc va thanh va cua te*.