Perhaps you should try some spelling variations:
trung va » truong va, trang va, trung ha
va triet » va thiet, va trien, ve triet
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
va hanh » van hanh, va thanh, va danh
hanh di » hanh vi, hanh de, hang di
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang
ve cam » ve cham, ve cac, va cam
va cao » va cac, va co, va dao
di va » dai va, di vao, doi va

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach v nang xa hoi. hieu ((ve cam) or (va cao)) trung va hanh di va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach v nang xa hoi. hieu ((ve cam) OR (va cao)) trung va hanh di va triet.
• Adding a wildcard symbol may retrieve word variants: su sach v nang xa hoi. hieu ((ve cam) or (va cao)) trung va hanh di va triet*.