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