Perhaps you should try some spelling variations:
chat luc » chat xuc, chat lua, nhan luc
thu sach » thuat sach, thuoc sach, thu hoach
vu chat » va chat, ve chat, du chat
hanh ve » hanh vi, hanh va, hanh kem
hanh de » hanh kem
tu sach » su sach, te sach, tu cach
hieu vu » hieu va, hieu ve, hieu su
luc va » duc va, tuc va, loc va
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)) ky nang x hoi. hieu vu chat luc va ((hanh de) OR (hanh ve)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ky nang x hoi. hieu vu chat luc va ((hanh de) OR (hanh ve)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (thu sach)) ky nang x hoi. hieu vu chat luc va ((hanh de) OR (hanh ve)) cua te".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) ky nang x hoi. hieu vu chat luc va ((hanh de) OR (hanh ve)) cua te*.