Perhaps you should try some spelling variations:
thien van » thi van
nang dau » hang dau, xang dau, nang du
vinh cuu » dinh cuu, sinh cua, dinh cu
te sach » toc sach
sach ky » sac ky, sach y, sach ty
dau hoi » cau hoi, dai hoi, dan hoi
va hanh » van hanh, va thanh, va danh
xuc va » duc va, tuc va, luc va
vi cuu » vi luu

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 dau hoi. ((thien van) or (lieu va)) cam xuc va hanh ((vi cuu) OR (vinh cuu)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang dau hoi. ((thien van) OR (lieu va)) cam xuc va hanh ((vi cuu) OR (vinh cuu)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang dau hoi. ((thien van) or (lieu va)) cam xuc va hanh ((vi cuu) OR (vinh cuu)) tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang dau hoi. ((thien van) or (lieu va)) cam xuc va hanh ((vi cuu) OR (vinh cuu)) tre*.