Perhaps you should try some spelling variations:
nang xa » nang x, nang ma, mang xa
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
va pham » van pham, va phat, va phap
duc van » duc tan, duc manh, duc phan
xanh di » danh di, vanh dai, xanh tai
tu dan » tuc dan, tu ban, cu dan
dan ky » van ky
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: tu dan ky ((nang xa) or (lang xa)) hoi. hieu va pham ((duc van) or (duc va)) xanh di cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu dan ky ((nang xa) OR (lang xa)) hoi. hieu va pham ((duc van) OR (duc va)) xanh di cua vat.
• Adding a wildcard symbol may retrieve word variants: tu dan ky ((nang xa) or (lang xa)) hoi. hieu va pham ((duc van) or (duc va)) xanh di cua vat*.