Perhaps you should try some spelling variations:
kho tang » cao tang
te sach » toc sach
danh vi » hanh vi, dinh vi, danh di
va danh » va dinh, va dan, va hanh
cuu tre » cua tre, cau tren, cau treo
ky tang » ky nang, ky dang, ky trong
ve cac » va cac, vien cac
luc va » duc va, tuc va, loc va
vi cuu » vi luu, vinh cuu
ve cam » ve cham, va cam, ve cai

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 tang) OR (kho tang)) xa hoi. hieu ((ve cam) or (ve cac)) luc va danh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ky tang) OR (kho tang)) xa hoi. hieu ((ve cam) OR (ve cac)) luc va danh vi cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((ky tang) OR (kho tang)) xa hoi. hieu ((ve cam) or (ve cac)) luc va danh vi cuu tre*".