Perhaps you should try some spelling variations:
nganh ky » nganh y, nganh xay, hanh ky
hang di » hang doi, hang vi, hang dien
va hang » van hang, va nang, va lang
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
cua tre » cua te, cuu tre, cua triet
di cua » dai cua, doi cua, de cua

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 hang di cua 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 hang di cua 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 hang di cua tre*.