Perhaps you should try some spelling variations:
thanh hoc » thanh hoa, than hoc, thanh ho
ky lang » ky nang, ky dang, ky tang
lang ha » long ha
hieu va » lieu va
va hanh » van hanh, va thanh, va danh
vai cua » dai cua, hai cua, lai cua
te cac » tu cac, ve cac, te cao
ha hoi » hoa hoi, ha noi, xa hoi
vi cua » di cua

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

• If you are trying to use Boolean operators, they must be ALL CAPS: te cac ky lang ha hoi. ((hieu va) OR (hieu qua)) thanh hoc va hanh ((vi cua) OR (vai cua)) tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te cac ky lang ha hoi. ((hieu va) OR (hieu qua)) thanh hoc va hanh ((vi cua) or (vai cua)) tre~".
• Adding a wildcard symbol may retrieve word variants: te cac ky lang ha hoi. ((hieu va) OR (hieu qua)) thanh hoc va hanh ((vi cua) or (vai cua)) tre*.