Perhaps you should try some spelling variations:
hanh lai » hanh lam, hanh tai, thanh lap
sach thu » sach thue, sach thieu, sach tham
lai cua » dai cua, hai cua, lai chau
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
cach tu » cach thuc
nang xa » nang x, lang xa, nang ma
va cam » va cham, va cac, va cao
ve cam » ve cham, ve cac, ve cai

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((cach tu) or (sach thu)) nang xa hoi. hieu ((ve cam) OR (va cam)) duc va hanh lai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((cach tu) OR (sach thu)) nang xa hoi. hieu ((ve cam) OR (va cam)) duc va hanh lai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((cach tu) or (sach thu)) nang xa hoi. hieu ((ve cam) OR (va cam)) duc va hanh lai cua tre".
• Adding a wildcard symbol may retrieve word variants: tu ((cach tu) or (sach thu)) nang xa hoi. hieu ((ve cam) OR (va cam)) duc va hanh lai cua tre*.