Perhaps you should try some spelling variations:
tham nuoc » thay nuoc, thoat nuoc, pham ngoc
thanh ve » hanh ve, thanh va, thanh vien
va thanh » gia thanh, ban thanh, va tinh
co sach » bo sach, cuon sach, hoc sach
hieu va » lieu va, hieu qua
ly hang » ly quang
ty hang » ty xang, thi hang, thu hang
cua tre » cua te, cuu tre, cua triet
ve cua » le cua, de cua, te cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: co sach ((ty hang) or (ly hang)) xa hoi. hieu va ((tham nuoc) OR (nha nuoc)) va thanh ve cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: co sach ((ty hang) OR (ly hang)) xa hoi. hieu va ((tham nuoc) OR (nha nuoc)) va thanh ve cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "co sach ((ty hang) or (ly hang)) xa hoi. hieu va ((tham nuoc) OR (nha nuoc)) va thanh ve cua tre".
• Adding a wildcard symbol may retrieve word variants: co sach ((ty hang) or (ly hang)) xa hoi. hieu va ((tham nuoc) OR (nha nuoc)) va thanh ve cua tre*.