Perhaps you should try some spelling variations:
danh hai » dang hai, lanh hai, manh hai
hai cua » thai cua, dai cua, hoi cua
sach ty » sach tu, sach thu, xach tay
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
cua tre » cua te, cuu tre, cua triet
ve cam » ve cham, ve cac, va cam
luc va » duc va, loc va
tuc va » thuc va, truc va, tuc xa

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sach ty) OR (sach y)) lang xa hoi. hieu ve cam ((luc va) or (tuc va)) danh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ty) OR (sach y)) lang xa hoi. hieu ve cam ((luc va) OR (tuc va)) danh hai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ty) OR (sach y)) lang xa hoi. hieu ve cam ((luc va) or (tuc va)) danh hai cua tre".
• Adding a wildcard symbol may retrieve word variants: te ((sach ty) OR (sach y)) lang xa hoi. hieu ve cam ((luc va) or (tuc va)) danh hai cua tre*.