Perhaps you should try some spelling variations:
hanh thai » nhanh thai, hinh thai, hanh tai
thi nang » thi cong, ki nang, thi hanh
thai cua » than cua, tai cuc, tri cua
van hanh » van thanh, ban hanh, van anh
cua tre » cua te, cuu tre, cua triet
vuc van » duc van, luc van, thuc van
thi van » thi lan, thi hanh
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
sac ky » cac ky, sai ky
so sac » so sach, so dac

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sac ky ((nang xa) OR (nang ma)) hoi. ((thi van) or (thi nang)) bac vuc van hanh thai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sac ky ((nang xa) OR (nang ma)) hoi. ((thi van) OR (thi nang)) bac vuc van hanh thai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sac ky ((nang xa) OR (nang ma)) hoi. ((thi van) or (thi nang)) bac vuc van hanh thai cua tre".
• Adding a wildcard symbol may retrieve word variants: so sac ky ((nang xa) OR (nang ma)) hoi. ((thi van) or (thi nang)) bac vuc van hanh thai cua tre*.