Perhaps you should try some spelling variations:
thieu nien » thien nhien
van khanh » van thanh, van hanh, van anh
truc van » truc va, thuc van, truc ban
cac truc » cau truc, cac tru, cac trung
nien cac » vien cac, dien cac, bien cac
sach v » sach va, sach y, sach vay
sach 2 » sach y
doi su » oi su, don su, voi su
x hoi » xa hoi, o hoi, x ho
di su » ki su, da su, de su

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) OR (sach 2)) nang x hoi. thieu nien cac truc van khanh ((di su) or (doi su)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach v) OR (sach 2)) nang x hoi. thieu nien cac truc van khanh ((di su) OR (doi su)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach v) OR (sach 2)) nang x hoi. thieu nien cac truc van khanh ((di su) or (doi su)) triet".
• Adding a wildcard symbol may retrieve word variants: su ((sach v) OR (sach 2)) nang x hoi. thieu nien cac truc van khanh ((di su) or (doi su)) triet*.