Perhaps you should try some spelling variations:
ve triet » va trien, su triet
hieu van » hieu va, thien van, lieu va
hanh lai » hanh lam, hanh tai, thanh lap
tan hanh » tan thanh, tang hanh, toan hanh
than duc » tran duc, phan duc, than doc
tham duc » pham duc, tham du, thach duc
sach thu » sach thue, sach thieu, sach tham
thu nang » thi nang, thu hang, thu bang
su sach » so sach, vu sach
lai ve » loai ve, lai va, la ve
o hoi » co hoi, o hoc, o hai
x hoi » xa hoi, x ho, 5 hoi

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 thu nang ((x hoi) OR (o hoi)). hieu van ((tham duc) OR (than duc)) tan hanh lai ve triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach thu nang ((x hoi) OR (o hoi)). hieu van ((tham duc) OR (than duc)) tan hanh lai ve triet*".