Perhaps you should try some spelling variations:
tang hanh » tang thanh, dang hanh, nang hanh
ve triet » va trien, su triet
hanh lai » hanh lam, hanh tai, thanh lap
tham duc » pham duc, than duc, thach duc
sach thu » sach thue, sach thieu, sach tham
hieu van » hieu va, thien van, lieu va
thu bang » thu ban, thu hang, chu bang
tham du » thap du, tham do, pham duc
su sach » so sach, vu sach
lai ve » loai ve, lai va, la ve
o hoc » co hoc, mo hoc, so hoc
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 thu bang ((x hoi) or (o hoc)). hieu van ((tham duc) or (tham du)) tang hanh lai ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach thu bang ((x hoi) OR (o hoc)). hieu van ((tham duc) OR (tham du)) tang hanh lai ve triet*.