Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
thanh di » thanh doi, thanh de, thanh do
te sach » toc sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu van
hieu va » lieu va, hieu qua
cau luc » cau truc, cau phuc
luc va » duc va, tuc va, loc va
y nang » ky nang, ly nang, v nang
cua tu » cua tuc, cua su, cua cu

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 y nang xa hoi. ((hieu ve) or (hieu va)) cau luc va thanh di ((cua te) OR (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang xa hoi. ((hieu ve) OR (hieu va)) cau luc va thanh di ((cua te) OR (cua tu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang xa hoi. ((hieu ve) or (hieu va)) cau luc va thanh di ((cua te) OR (cua tu))".
• Adding a wildcard symbol may retrieve word variants: te sach y nang xa hoi. ((hieu ve) or (hieu va)) cau luc va thanh di ((cua te) OR (cua tu))*.