Perhaps you should try some spelling variations:
lang hai » lang chai, lang thai, lang ha
hieu va » lieu va, hieu qua
hai cua » thai cua, dai cua, hoi cua
sach va » sach xa, sach ha, sach dao
va lang » va nang, hoa lang
cam duc » cam xuc, cao duc, pham duc
mai hoi » mai khoi, dai hoi, lai hoi
va cam » va cham, va cac, va cao
cua te » cua tu
sach v » sach y, sach 2, sach vay
me hoi » le hoi

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 v) OR (sach va)) nang ((me hoi) or (mai hoi)). hieu va cam duc va lang hai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach v) OR (sach va)) nang ((me hoi) OR (mai hoi)). hieu va cam duc va lang hai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach v) OR (sach va)) nang ((me hoi) or (mai hoi)). hieu va cam duc va lang hai cua te".
• Adding a wildcard symbol may retrieve word variants: te ((sach v) OR (sach va)) nang ((me hoi) or (mai hoi)). hieu va cam duc va lang hai cua te*.