Perhaps you should try some spelling variations:
thanh doi » thanh loi, thanh moi, thanh do
hieu van » hieu va, thien van, lieu va
va thanh » gia thanh, ban thanh, va tinh
chat tuc » chat xuc, luat tuc, chat huu
van chat » cao chat
doi cua » dai cua, hoi cua, dong cua
tu sach » thu sach, su sach, te sach
cua tre » cua te, cuu tre, cua triet
v nang » va nang, vu nang, van nang
tuc va » thuc va, truc va, tuc xa
y nang » ky nang, ly 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) or (thu hoach)) ((y nang) OR (v nang)) xa hoi. hieu van chat tuc va thanh doi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu hoach)) ((y nang) OR (v nang)) xa hoi. hieu van chat tuc va thanh doi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (thu hoach)) ((y nang) OR (v nang)) xa hoi. hieu van chat tuc va thanh doi cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu hoach)) ((y nang) OR (v nang)) xa hoi. hieu van chat tuc va thanh doi cua tre*.