Perhaps you should try some spelling variations:
xanh hanh » danh thanh, ban hanh, van hanh
toc sach » hoc sach, thuoc sach, nuoc sach
duc xanh » duc anh, duc manh, duc hanh
doc sach » hoc sach, nuoc sach, dac sac
va triet » va thiet, va trien, ve triet
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
van cao » van dao, van bao, van cau
van hao » van dao, van ha, van bao
vi va » vi van, vai va, vu va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((toc sach) or (doc sach)) ty nang xa hoi. hieu ((van cao) OR (van hao)) duc xanh hanh vi va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (doc sach)) ty nang xa hoi. hieu ((van cao) OR (van hao)) duc xanh hanh vi va triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) or (doc sach)) ty nang xa hoi. hieu ((van cao) OR (van hao)) duc xanh hanh vi va triet*".