Perhaps you should try some spelling variations:
thanh lap » thanh san, phan lap, thanh hai
sach thue » sach thieu, sach tham, cach thuc
hanh lai » hanh lam, hanh tai, thanh loi
sach thu » sach thieu, sach tham, cach thuc
cua tre » cua te, cuu tre, cua triet
cam duc » cam xuc, cao duc, pham duc
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
ve cam » ve cham, ve cac, va cam

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