Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
anh bia » anh giao
anh via » anh va, anh viet, anh giao
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
tu sach » thu sach, su sach, te sach
cua tre » cua te, cuu tre, cua triet
ve cac » va cac, vien cac
cac vo » cac co, cac vi, cac bo

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thuat sach) or (tu sach)) ky lang xa hoi. hieu ve cac vo van ((anh via) OR (anh bia)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuat sach) OR (tu sach)) ky lang xa hoi. hieu ve cac vo van ((anh via) OR (anh bia)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thuat sach) or (tu sach)) ky lang xa hoi. hieu ve cac vo van ((anh via) OR (anh bia)) cua tre".
• Adding a wildcard symbol may retrieve word variants: ((thuat sach) or (tu sach)) ky lang xa hoi. hieu ve cac vo van ((anh via) OR (anh bia)) cua tre*.