Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
cham luu » cham cuu, chat lua, phap luu
vu sach » vu bach, su sach, vu khach
hanh di » hanh vi, hanh de, hang di
luu van » cuu van, luan van, luu hanh
va cham » va chat, va tham
cua tre » cua te, cuu tre, cua triet
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
vu khac » vu kham, vu khanh, bui khac
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu sach) or (vu khac)) y ((nang xa) or (nang ma)) hoi. lieu va cham luu van hanh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (vu khac)) y ((nang xa) OR (nang ma)) hoi. lieu va cham luu van hanh di cua tre.
• Adding a wildcard symbol may retrieve word variants: ((vu sach) or (vu khac)) y ((nang xa) or (nang ma)) hoi. lieu va cham luu van hanh di cua tre*.