Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
thanh lai » thanh hai, thanh lap, thanh loi
hieu van » hieu va, thien van, lieu va
va thanh » gia thanh, ban thanh, va tinh
va triet » va trien, ve triet, cua triet
te sach » toc sach
van bac » van ban, van bao, van hac
x hoi » xa hoi, o hoi, x ho
thiet » thieu

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

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