Perhaps you should try some spelling variations:
thien van » thi van
luoc van » luoc can, luoc va, luot van
te sach » toc sach
sach ky » sac ky, sach y, sach ty
nang co » nang cao, nang doc, nang noi
luc van » luu van, duc van, luc va
vai cua » dai cua, hai cua, lai cua
co loi » co hoi
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 ky nang co loi. thien van nam ((luc van) OR (luoc van)) tuan ((vi cua) or (vai cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang co loi. thien van nam ((luc van) OR (luoc van)) tuan ((vi cua) OR (vai cua)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang co loi. thien van nam ((luc van) OR (luoc van)) tuan ((vi cua) or (vai cua)) triet".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang co loi. thien van nam ((luc van) OR (luoc van)) tuan ((vi cua) or (vai cua)) triet*.