Perhaps you should try some spelling variations:
nang cau » nang cao, hang cau, nang dau
te sach » toc sach
sach ky » sac ky, sach y, sach ty
hieu vu » hieu va, hieu ve, hieu su
vu kham » vu khanh
dau cua » day cua, cau cua, dan cua
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa

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 cau hoi. hieu vu kham ((xuc va) or (tuc va)) dan ((dau cua) or (dai cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang cau hoi. hieu vu kham ((xuc va) OR (tuc va)) dan ((dau cua) OR (dai cua)) te.
• Adding a wildcard symbol may retrieve word variants: te sach ky nang cau hoi. hieu vu kham ((xuc va) or (tuc va)) dan ((dau cua) or (dai cua)) te*.