Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
thanh di » thanh doi, thanh do, thanh dinh
thanh de » hanh de, thanh ve, thanh do
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu va » lieu va
cam duc » cam xuc, cao duc, pham duc
cua te » cua tu

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

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