Perhaps you should try some spelling variations:
hieu van » thien van, lieu va, hieu ve
danh vai » danh sai, danh va, doanh van
vai cua » dai cua, hai cua, lai cua
va danh » va dinh, va dan, va hanh
cau duc » cao duc, cau luc, chu duc
hieu va » lieu va, hieu qua
sach ly » sach y, sach lo, sach hay
lang ha » long ha
sach ty » sach y, sach tu, sach thu
cua tre » cua te, cuu tre, cua triet
ha hoi » hoa hoi, ha noi, xa hoi

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 ly) or (sach ty)) lang ha hoi. ((hieu van) or (hieu va)) cau duc va danh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ly) OR (sach ty)) lang ha hoi. ((hieu van) OR (hieu va)) cau duc va danh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: tu ((sach ly) or (sach ty)) lang ha hoi. ((hieu van) or (hieu va)) cau duc va danh vai cua tre*.