Perhaps you should try some spelling variations:
thue lang » thu hang, thu bang, que lang
danh vai » danh sai, danh va, doanh van
phu lang » phap lang, phu khang, phu luong
su sach » so sach, vu sach
cao duc » dao duc, cao suc, giao duc
vai cua » dai cua, hai cua, lai cua
va danh » va dinh, va dan, va hanh
hieu va » lieu va, hieu qua
cac duc » cac du, cac dac, cac nuoc
cua tre » cua te, cuu tre, cua triet

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ((thue lang) OR (phu lang)) xa hoi. hieu va ((cac duc) or (cao duc)) va danh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((thue lang) OR (phu lang)) xa hoi. hieu va ((cac duc) OR (cao duc)) va danh vai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((thue lang) OR (phu lang)) xa hoi. hieu va ((cac duc) or (cao duc)) va danh vai cua tre*".