Perhaps you should try some spelling variations:
nganh ky » nganh y, nganh xay, hanh ky
hanh di » hanh vi, hanh de, hang di
va hanh » van hanh, va thanh, va danh
cac duc » cao duc, cac dac, cac nuoc
sanh ky » hanh ky, sang ky, thanh ky
hieu va » lieu va, hieu qua
tang xa » trang xa, tang ma, lang xa
cuu tre » cua tre, cau tren, cau treo
di cuu » di cau, di cua, dinh cuu

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

• Performing a fuzzy search may retrieve terms with similar spellings: so ((sanh ky) or (nganh ky)) tang xa hoi. hieu va ((cac duc) or (cac du)) va hanh di cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so ((sanh ky) OR (nganh ky)) tang xa hoi. hieu va ((cac duc) OR (cac du)) va hanh di cuu tre.
• Adding a wildcard symbol may retrieve word variants: so ((sanh ky) or (nganh ky)) tang xa hoi. hieu va ((cac duc) or (cac du)) va hanh di cuu tre*.