Perhaps you should try some spelling variations:
nang mai » nang ma, nang tai, lang mai
hieu van » hieu va, thien van, lieu va
hoc cac » hoc cao
mai hoi » mai khoi, dai hoi, lai hoi
van chu » van chi, van phu, van cau
chu duc » thu duc, chua duoc, cuu duoc
va dinh » van dinh, va kinh, va tinh
vi cau » va cau, di cau, viet cau
ve cau » ke cau, va cau, ve cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc cac ky nang mai hoi. hieu van chu duc va dinh ((vi cau) OR (ve cau)) tren~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc cac ky nang mai hoi. hieu van chu duc va dinh ((vi cau) OR (ve cau)) tren".
• Adding a wildcard symbol may retrieve word variants: hoc cac ky nang mai hoi. hieu van chu duc va dinh ((vi cau) OR (ve cau)) tren*.