Perhaps you should try some spelling variations:
ban hanh » ban hang
dua tren » dung tren
sinh ty » sinh ly, sinh y, sinh tu
ty nang » ky nang, ty xang, ty hang
nang ma » tang ma, sang ma, nang cao
luc ban » duc ban, cuc ban, luc bat
ve cau » ke cau, va cau, le cau
ve cac » va cac, vien cac
vi dua » vi du, vi dum, vi lua

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sinh ty nang ma hoa. hieu ((ve cau) or (ve cac)) luc ban hanh vi dua tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sinh ty nang ma hoa. hieu ((ve cau) OR (ve cac)) luc ban hanh vi dua tren*.