Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thue nang » thien nang, thuat nang, chuc nang
thanh lai » thanh hai, thanh lap, thanh loi
doc sach » hoc sach, toc sach, nuoc sach
thi nang » thi cong, ki nang, thi hanh
lai cua » dai cua, hai cua, lai chau
hieu va » lieu va, hieu qua
va cam » va cham, va cac, va cao
luc va » tuc va, loc va

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

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