Perhaps you should try some spelling variations:
hai long » hai phong, hai duong
te sach » toc sach
ky dang » ky nang, ky danh
xay hoi » xa hoi, tay hoi, cay phoi
hieu va » lieu va, hieu qua
long va » luong va, long van, blong va
va hanh » van hanh, va thanh, va danh
vai cua » dai cua, hai cua, lai cua
y dang » 2 dang, _ dang, b dang
va hai » van hai, va chai, va khai
vi cua » di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ((y dang) OR (ky dang)) xay hoi. hieu va hai long va hanh ((vi cua) or (vai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((y dang) OR (ky dang)) xay hoi. hieu va hai long va hanh ((vi cua) OR (vai cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((y dang) OR (ky dang)) xay hoi. hieu va hai long va hanh ((vi cua) or (vai cua)) tre".
• Adding a wildcard symbol may retrieve word variants: te sach ((y dang) OR (ky dang)) xay hoi. hieu va hai long va hanh ((vi cua) or (vai cua)) tre*.