Perhaps you should try some spelling variations:
thien van » thi van
tan thanh » tran thanh, tang thanh, toan thanh
thu sach » thuat sach, thuoc sach, thu hoach
hieu van » hieu va, lieu va, hieu ve
tu sach » su sach, te sach, tu cach
bao luc » bao thuc
luc tan » luc tai, duc tan, luc tam
san cua » sang cua, ban cua, dan cua
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
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) OR (thu sach)) y nang x hoi. ((hieu van) or (thien van)) bao luc tan thanh san cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) y nang x hoi. ((hieu van) OR (thien van)) bao luc tan thanh san cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) y nang x hoi. ((hieu van) or (thien van)) bao luc tan thanh san cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (thu sach)) y nang x hoi. ((hieu van) or (thien van)) bao luc tan thanh san cua tre*.