Perhaps you should try some spelling variations:
hanh hai » thanh hai, nhanh hai, hang hai
nang ma » tang ma, sang ma, nang cao
ve pham » vi pham, ve phan, ve phat
va hanh » van hanh, va thanh, va danh
hai cua » thai cua, dai cua, hoi cua
tu can » tu ban, tu cac, thu canh
can ky » van ky, dan ky, ban ky
v pham » vi pham, d pham
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu can ky ((nang ma) or (nang x)) hoi. hieu ((ve pham) OR (v pham)) duc va hanh hai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu can ky ((nang ma) OR (nang x)) hoi. hieu ((ve pham) OR (v pham)) duc va hanh hai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu can ky ((nang ma) or (nang x)) hoi. hieu ((ve pham) OR (v pham)) duc va hanh hai cua te".
• Adding a wildcard symbol may retrieve word variants: tu can ky ((nang ma) or (nang x)) hoi. hieu ((ve pham) OR (v pham)) duc va hanh hai cua te*.