Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
hanh van » thanh van, khanh van, hanh san
tang van » dang van, hoang van, trong van
tu sach » su sach, te sach, tu cach
hanh va » hang va, hanh vi
hieu vu » hieu va, hieu ve, hieu su
van hoi » van hoa, van hoc, van hoe
lo tang » le tang, do tang, lo tan
cuu tre » cua tre, cau tren, cau treo
vu cam » vu cham, vu cao, va cam
xuc va » duc va, tuc va, luc va

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) OR (thu sach)) lo tang van hoi. hieu vu cam xuc va ((hanh van) or (hanh va)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) lo tang van hoi. hieu vu cam xuc va ((hanh van) OR (hanh va)) cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) lo tang van hoi. hieu vu cam xuc va ((hanh van) or (hanh va)) cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (thu sach)) lo tang van hoi. hieu vu cam xuc va ((hanh van) or (hanh va)) cuu tre*.