Perhaps you should try some spelling variations:
duc thang » duc tan, duc hung
duc tang » duc tan, tuc tang, duc tung
hanh lai » hanh lam, hanh tai, thanh lap
thu nang » thi nang, thu hang, thu bang
tu sach » thu sach, su sach, tu cach
lai cua » dai cua, hai cua, lai chau
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
te sach » toc sach
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 thang)) hanh lai 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 thang)) hanh lai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (te sach)) thu nang xa hoi. hieu ve cam ((duc tang) OR (duc thang)) hanh lai 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 thang)) hanh lai cua tre*.