Perhaps you should try some spelling variations:
thanh van » thanh san, thanh toan, thanh phan
dau tren » dau tien, dat tren, dau tieng
cham xuc » cam xuc, chat xuc, cham soc
hieu van » hieu va, thien van, lieu va
hieu ve » hieu va
sach lo » sach dao, sach doi, sach hoi
sang ma » tang ma, nang ma, sang tao
lo sang » lam sang, luc sang, cao sang
hanh va » hang va, hanh vi
tu sach » thu sach, su sach, te sach
ma hoi » mai hoi, xa hoi, ma hoa
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 lo sang ma hoi. ((hieu ve) OR (hieu van)) cham xuc va ((thanh van) or (hanh va)) dau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach lo sang ma hoi. ((hieu ve) OR (hieu van)) cham xuc va ((thanh van) OR (hanh va)) dau tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach lo sang ma hoi. ((hieu ve) OR (hieu van)) cham xuc va ((thanh van) or (hanh va)) dau tren".
• Adding a wildcard symbol may retrieve word variants: tu sach lo sang ma hoi. ((hieu ve) OR (hieu van)) cham xuc va ((thanh van) or (hanh va)) dau tren*.