Perhaps you should try some spelling variations:
hanh thai » nhanh thai, hinh thai, hanh tai
thai cuu » thai cua, tai cuc, thi cuc
van hanh » van thanh, ban hanh, van anh
hieu ve » hieu va, hieu van
duc van » duc va, duc tan, duc manh
cac duc » cac du, cao duc, cac dac
cuu tre » cua tre, cau tren, cau treo
nang ro » nang co, nang ho, nang ra
ve cac » va cac, vien cac
nang o » nang co, nang ho, nang x
tu san » thu san, tu ban, tu can
tu sac » tu sach, tu cac, tu bac

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sac) or (tu san)) ky ((nang o) or (nang ro)) lai. hieu ve cac duc van hanh thai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sac) OR (tu san)) ky ((nang o) OR (nang ro)) lai. hieu ve cac duc van hanh thai cuu tre*.