Perhaps you should try some spelling variations:
kho tang » cao tang
cua tre » cua te, cuu tre, cua triet
hanh di » hanh vi, hanh de, hang di
va hanh » van hanh, va thanh, va danh
ky tang » ky nang, ky dang, ky trong
ma hoi » mai hoi, xa hoi, ma hoa
ve dat » de dat, va dat, viec dat
ve dao » de dao, va dao, ve bao
di cua » dai cua, doi cua, de cua
vu ban » tu ban, va ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu ban ((ky tang) or (kho tang)) ma hoi. hieu ((ve dat) OR (ve dao)) nuoc va hanh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu ban ((ky tang) OR (kho tang)) ma hoi. hieu ((ve dat) OR (ve dao)) nuoc va hanh di cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu ban ((ky tang) or (kho tang)) ma hoi. hieu ((ve dat) OR (ve dao)) nuoc va hanh di cua tre*".