Perhaps you should try some spelling variations:
thien van » thi van
thanh ca » thanh cha, thanh cac, thanh ha
thu sach » thuat sach, thuoc sach, thu hoach
va thanh » gia thanh, ban thanh, va tinh
tu sach » su sach, te sach, tu cach
cam duc » cam xuc, cao duc, pham duc
ty nang » ky nang, ty xang, ty hang
ca cua » co cua
cua te » cua tu
x hoi » xa hoi, o hoi, x ho

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) OR (thu sach)) ty nang x hoi. ((hieu qua) or (thien van)) cam duc va thanh ca cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ty nang x hoi. ((hieu qua) OR (thien van)) cam duc va thanh ca cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) ty nang x hoi. ((hieu qua) or (thien van)) cam duc va thanh ca cua te".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (thu sach)) ty nang x hoi. ((hieu qua) or (thien van)) cam duc va thanh ca cua te*.