Perhaps you should try some spelling variations:
thien van » thi van
hanh thai » nhanh thai, hinh thai, hanh tai
van phat » va phat, van chat, van phan
phat duc » pham duc, phan duc, phan duoc
thai cua » than cua, tai cuc, tri cua
nang ma » tang ma, sang ma, nang cao
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 tu » cua tuc, cua su, cua cu

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. thien van phat duc va hanh thai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu can ky ((nang ma) OR (nang x)) hoi. thien van phat duc va hanh thai cua tu.
• Adding a wildcard symbol may retrieve word variants: tu can ky ((nang ma) or (nang x)) hoi. thien van phat duc va hanh thai cua tu*.