Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
cau tren » cu tren, dau tren, ca tren
thi hang » thi hanh, thi nang, thi hong
vai cau » va cau, van cau, vai cac
su sach » so sach, vu sach
ty hang » ly hang, ty xang, thu hang
hieu ve » hieu va, hieu van
ve cac » va cac, vien cac
xuc va » tuc va, luc va, xac va

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ((ty hang) or (thi hang)) co hoc. hieu ve cac ((xuc va) OR (duc va)) thanh vai cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ty hang) OR (thi hang)) co hoc. hieu ve cac ((xuc va) OR (duc va)) thanh vai cau tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ty hang) or (thi hang)) co hoc. hieu ve cac ((xuc va) OR (duc va)) thanh vai cau tren".
• Adding a wildcard symbol may retrieve word variants: su sach ((ty hang) or (thi hang)) co hoc. hieu ve cac ((xuc va) OR (duc va)) thanh vai cau tren*.