Perhaps you should try some spelling variations:
hanh hai » thanh hai, nhanh hai, hang hai
thu nang » thi nang, thu hang, thu bang
duc tang » duc thang, duc tan, tuc tang
tu sach » thu sach, su sach, tu cach
hai cua » thai cua, dai cua, hoi cua
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
te sach » toc sach
cua tre » cua te, cuu tre, cua triet
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) or (te sach)) thu nang xa hoi. hieu ve cam ((duc tang) or (duc hung)) hanh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) thu nang xa hoi. hieu ve cam ((duc tang) OR (duc hung)) hanh hai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) thu nang xa hoi. hieu ve cam ((duc tang) or (duc hung)) hanh hai cua tre*.