Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hieu van » thien van, lieu va, hieu ve
tu cach » tu cac
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va hanh » van hanh, va thanh, va danh
cuu tre » cua tre, cau tren, cau treo
xuc va » duc va, tuc va, luc va
vi cuu » vi luu, vinh cuu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cach) or (thu sach)) ky nang xa hoi. ((hieu va) or (hieu van)) cam xuc va hanh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (thu sach)) ky nang xa hoi. ((hieu va) OR (hieu van)) cam xuc va hanh vi cuu tre.
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (thu sach)) ky nang xa hoi. ((hieu va) or (hieu van)) cam xuc va hanh vi cuu tre*.