Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
hieu van » thien van, lieu va, hieu ve
tu sach » thu sach, su sach, te sach
hieu va » lieu va, hieu qua
nam xuc » cam xuc, nam xua, nam thuc
xuc van » duc van, luc van, xuc ban
cuu tre » cua tre, cau tren, cau treo
tu sac » tu cac, tu san, tu bac
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 sac) OR (tu sach)) ky nang x ho. ((hieu van) or (hieu va)) nam xuc van hanh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sac) OR (tu sach)) ky nang x ho. ((hieu van) OR (hieu va)) nam xuc van hanh vi cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sac) OR (tu sach)) ky nang x ho. ((hieu van) or (hieu va)) nam xuc van hanh vi cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sac) OR (tu sach)) ky nang x ho. ((hieu van) or (hieu va)) nam xuc van hanh vi cuu tre*.