Perhaps you should try some spelling variations:
thanh di » thanh doi, thanh de, thanh do
tu sach » thu sach, su sach, te sach
hieu va » lieu va, hieu qua
ly nang » ky nang, ly hang, ly vang
hieu ve » hieu van
luc gia » luoc gia, duc gia, quoc gia
cau luc » cau truc, cau phuc
di cua » dai cua, doi cua, de cua
cua te » cua tu
y nang » ky nang, v nang, may nang

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

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