Perhaps you should try some spelling variations:
hanh thai » nhanh thai, hinh thai, hanh tai
thai cua » than cua, tai cuc, tri cua
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
ve pham » vi pham, v pham, ve phan
va hanh » van hanh, va thanh, va danh
tu can » tu ban, tu cac, thu canh
can ky » van ky, dan ky, ban ky
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 duc va hanh thai 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 duc va hanh thai cua te.
• Adding a wildcard symbol may retrieve word variants: tu can ky ((nang ma) or (nang x)) hoi. hieu ve pham duc va hanh thai cua te*.