Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hoc sach » hoc sinh, hoc cac, hoc anh
tai cua » thai cua, tai cuc, tri cua
han tai » hang tai, nhan tai, van tai
truc va » thuc va, thuc vat, trung va
ky tang » ky nang, ky dang, kho tang
tang xa » trang xa, tang ma, lang xa
va dao » ca dao
tuc va » thuc va, tuc xa, duc va
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu sach) or (hoc sach)) ky tang xa hoi. lieu va dao ((tuc va) OR (truc va)) han tai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (hoc sach)) ky tang xa hoi. lieu va dao ((tuc va) OR (truc va)) han tai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) or (hoc sach)) ky tang xa hoi. lieu va dao ((tuc va) OR (truc va)) han tai cua te".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (hoc sach)) ky tang xa hoi. lieu va dao ((tuc va) OR (truc va)) han tai cua te*.