Perhaps you should try some spelling variations:
ty nang » ky nang, ty xang, ly nang
ty hang » ly hang, ty xang, thi hang
cau duc » cao duc, cau luc, chu duc
va hanh » van hanh, va thanh, va danh
cu tren » tu tren, dua tren
ma hoi » mai hoi, xa hoi, me hoi
va cau » van cau, va cac, va dau
vi cu » vi su, vi xu, vi du

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) or (ty hang)) ((ma hoi) or (ma hoa)). lieu va cau duc va hanh vi cu tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sinh ((ty nang) OR (ty hang)) ((ma hoi) OR (ma hoa)). lieu va cau duc va hanh vi cu tren.
• Adding a wildcard symbol may retrieve word variants: hoc sinh ((ty nang) or (ty hang)) ((ma hoi) or (ma hoa)). lieu va cau duc va hanh vi cu tren*.