Perhaps you should try some spelling variations:
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
tu san » thu san, tu ban, tu can
san ky » sang ky, van ky, dan ky
ma hoi » mai hoi, xa hoi, ma hoa
cam ly » tam ly, cam ky, cam lo
vi cua » vai cua, di cua

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

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