Perhaps you should try some spelling variations:
hanh lai » hanh lam, hanh tai, thanh lap
hieu va » lieu va, hieu qua
lai cua » dai cua, hai cua, lai chau
sach va » sach xa, sach ha, sach dao
nang xa » nang x, lang xa, nang ma
hieu ve » hieu van
va hanh » van hanh, va thanh, va danh
truc va » thuc va, thuc vat, trung va
cua te » cua tu
sach v » sach y, sach 2, sach vay

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 v) OR (sach va)) nang xa hoi. ((hieu ve) or (hieu va)) cau truc va hanh lai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach v) OR (sach va)) nang xa hoi. ((hieu ve) OR (hieu va)) cau truc va hanh lai cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach v) OR (sach va)) nang xa hoi. ((hieu ve) or (hieu va)) cau truc va hanh lai cua te*".