Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
hieu viec » nhieu viec, hieu ve, sieu viet
viec cac » vien cac, viec cua, viec lam
ty hang » ly hang, ty xang, thi hang
sach ty » sach y, sach tu, sach thu
hang x » nang x, hoang xa, chang xu
tuc va » thuc va, truc va, tuc xa
ve van » le van
tac va » tac da, tac xa, tac ha
x hoi » xa hoi, o hoi, x ho
ve va » te va, ke va, le va

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc sach ty hang x hoi. hieu viec cac ((tac va) OR (tuc va)) thanh ((ve va) or (ve van)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ty hang x hoi. hieu viec cac ((tac va) OR (tuc va)) thanh ((ve va) OR (ve van)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach ty hang x hoi. hieu viec cac ((tac va) OR (tuc va)) thanh ((ve va) or (ve van)) triet".
• Adding a wildcard symbol may retrieve word variants: thuoc sach ty hang x hoi. hieu viec cac ((tac va) OR (tuc va)) thanh ((ve va) or (ve van)) triet*.