Perhaps you should try some spelling variations:
manh nhan » danh nhan, anh nhan, minh nhan
dua tren » dung tren
nhan tai » hang tai, van tai, toan tai
su sach » so sach, vu sach
ly nang » ky nang, ly hang, ly vang
sach ly » sach y, sach lo, sach ty
cua te » cua tu
ve cac » va cac, vien cac
ve cao » va cao, ve bao, ve co
x hoi » xa hoi, o hoi, x ho

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 ly nang x hoi. hieu ((ve cao) or (ve cac)) suc manh nhan tai ((dua tren) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ly nang x hoi. hieu ((ve cao) OR (ve cac)) suc manh nhan tai ((dua tren) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: su sach ly nang x hoi. hieu ((ve cao) or (ve cac)) suc manh nhan tai ((dua tren) or (cua te))*.