Perhaps you should try some spelling variations:
hanh nhan » thanh nhan, danh nhan, anh nhan
nhan cua » nhat cua, nhan luc, nhan su
thu xac » thau xay
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
nang xa » lang xa, nang ma, mang xa
hieu va » lieu va
xac ky » cac ky, sac ky, bac ky
cac lo » cac lop, cac co, cac bo
lo va » lo van, lao va, ly va

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu xac ky ((nang xa) OR (nang x)) hoi. ((hieu va) or (hieu qua)) cac lo va hanh nhan cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu xac ky ((nang xa) OR (nang x)) hoi. ((hieu va) OR (hieu qua)) cac lo va hanh nhan cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu xac ky ((nang xa) OR (nang x)) hoi. ((hieu va) or (hieu qua)) cac lo va hanh nhan cua tre".
• Adding a wildcard symbol may retrieve word variants: thu xac ky ((nang xa) OR (nang x)) hoi. ((hieu va) or (hieu qua)) cac lo va hanh nhan cua tre*.