Perhaps you should try some spelling variations:
thien van » thi van
thanh lam » thanh lap, hanh lam, thanh nam
hieu van » hieu va, lieu va, hieu ve
va thanh » gia thanh, ban thanh, va tinh
te sach » toc sach
bo sach » co sach, hoc sach
cao duc » dao duc, cao suc, giao duc
lam cua » nam cua, lam chat
cua te » cua tu
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: ((te sach) or (bo sach)) ky nang x hoi. ((hieu van) OR (thien van)) cao duc va thanh lam cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (bo sach)) ky nang x hoi. ((hieu van) OR (thien van)) cao duc va thanh lam cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (bo sach)) ky nang x hoi. ((hieu van) OR (thien van)) cao duc va thanh lam cua te".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (bo sach)) ky nang x hoi. ((hieu van) OR (thien van)) cao duc va thanh lam cua te*.