Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
so sanh » do sanh
qua cam » qua cham, qua cac, qua ca
cam tuc » cam xuc, cam tu, nam thuc
va tinh » may tinh
voi cua » hoi cua, doi cua, coi cua
moi cua » hoi cua, doi cua, moi quan
tuc va » thuc va, truc va, tuc xa
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 (so sanh)) ky nang x hoi. hieu qua cam tuc va tinh ((voi cua) OR (moi cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (so sanh)) ky nang x hoi. hieu qua cam tuc va tinh ((voi cua) OR (moi cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (so sanh)) ky nang x hoi. hieu qua cam tuc va tinh ((voi cua) OR (moi cua)) tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (so sanh)) ky nang x hoi. hieu qua cam tuc va tinh ((voi cua) OR (moi cua)) tre*.