Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
va thanh » ban thanh, va tinh, le thanh
ly nang » ky nang, ly hang, ly vang
hieu va » lieu va, hieu qua
van chi » van chien, luan chi, van chat
chi tre » choi tre, cho tre, chi tro
y nang » ky nang, v nang, may nang
va cam » va cham, va cac, va cao

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) OR (ly nang)) xa hoi. hieu va cam xuc ((va thanh) or (gia thanh)) van chi tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((y nang) OR (ly nang)) xa hoi. hieu va cam xuc ((va thanh) OR (gia thanh)) van chi tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ((y nang) OR (ly nang)) xa hoi. hieu va cam xuc ((va thanh) or (gia thanh)) van chi tre".
• Adding a wildcard symbol may retrieve word variants: thu sach ((y nang) OR (ly nang)) xa hoi. hieu va cam xuc ((va thanh) or (gia thanh)) van chi tre*.