Perhaps you should try some spelling variations:
dieu cua » dieu tra
te sach » toc sach
tu sach » thu sach, su sach, tu cach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
coc duc » hoc duc, coc luc, hoc duoc
duc gia » quoc gia
ve coc » ve cuoc, ve cac, ve co
de cua » le cua, te cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) or (tu sach)) ky nang xa hoi. hieu ve coc duc gia thanh ((de cua) OR (dieu cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (tu sach)) ky nang xa hoi. hieu ve coc duc gia thanh ((de cua) OR (dieu cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (tu sach)) ky nang xa hoi. hieu ve coc duc gia thanh ((de cua) OR (dieu cua)) tre".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (tu sach)) ky nang xa hoi. hieu ve coc duc gia thanh ((de cua) OR (dieu cua)) tre*.