Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh lap » thanh san, phan lap, thanh hai
van chat » cao chat
quoc ban » quoc bao, quoc lan, quoc quan
lap chau » lai chau, a chau, ha chau
chau tre » chay tren, chau tho, cho tre
tu sach » thu sach, su sach, te sach
sach ly » sach y, sach lo, sach ty
ly nang » ky nang, ly hang, ly vang
van cam » van nam, van lam, van cau
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 ly nang x hoi. hieu ((van cam) or (van chat)) quoc ban thanh lap chau tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ly nang x hoi. hieu ((van cam) OR (van chat)) quoc ban thanh lap chau tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ly nang x hoi. hieu ((van cam) or (van chat)) quoc ban thanh lap chau tre*.