Perhaps you should try some spelling variations:
nam truc » nam truoc, nam thuc, nam trung
hieu va » lieu va, hieu qua
nam tuc » nam thuc, nam thuoc, nam truoc
va hanh » van hanh, va thanh, va danh
cuu tre » cua tre, cau tren, cau treo
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
nang o » nang co, nang ho, nang ro
nam tu » nam thu, nam thuc
vi cuu » vi luu, vinh cuu
o hoi » co hoi, o hoc, o hai

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 ky nang o hoi. hieu va ((((nam tuc) or (nam truc))) or (nam tu)) va hanh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang o hoi. hieu va ((((nam tuc) OR (nam truc))) OR (nam tu)) va hanh vi cuu tre.
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang o hoi. hieu va ((((nam tuc) or (nam truc))) or (nam tu)) va hanh vi cuu tre*.