Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
van hanh » van thanh, ban hanh, van anh
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
cam duc » cam xuc, cao duc, nam duoc
doi cua » hoi cua, dong cua
y nang » ky nang, ly nang, v nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach y nang xa hoi. hieu ve ((cam duc) or (pham duc)) van hanh ((doi cua) OR (dai cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y nang xa hoi. hieu ve ((cam duc) OR (pham duc)) van hanh ((doi cua) OR (dai cua)) te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y nang xa hoi. hieu ve ((cam duc) or (pham duc)) van hanh ((doi cua) OR (dai cua)) te".
• Adding a wildcard symbol may retrieve word variants: thu sach y nang xa hoi. hieu ve ((cam duc) or (pham duc)) van hanh ((doi cua) OR (dai cua)) te*.