Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
tu cach » tu cac
va hanh » van hanh, va thanh, va danh
xa hanh » xa thanh, xa khanh, da hanh
cao xuc » cam xuc, cao duc, cao suc
cuu tre » cua tre, cau tren, cau treo
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
vi cuu » vi luu, vinh cuu
va cao » va cac, va co, va dao

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 cao xuc ((xa hanh) OR (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 cao xuc ((xa hanh) OR (va hanh)) vi cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu cach) or (thu sach)) ky nang xa hoi. hieu va cao xuc ((xa hanh) OR (va hanh)) vi cuu tre*".