Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
hieu viec » nhieu viec, hieu ve, sieu viet
thu sach » tu sach, thuoc sach, thu hoach
hang vai » hang tai, hang hai, hang vi
viec cac » vien cac, viec cua, viec lam
ly nang » ky nang, ly hang, ly vang
cac duc » cac du, cao duc, cac dac
duc ban » duc tan, duc van, dua ban
cua tre » cua te, cuu tre, cua triet
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: ((thu sach) or (thuat sach)) ly nang x hoi. hieu viec cac duc ban ((hang vai) or (hang va)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (thuat sach)) ly nang x hoi. hieu viec cac duc ban ((hang vai) OR (hang va)) cua tre.
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (thuat sach)) ly nang x hoi. hieu viec cac duc ban ((hang vai) or (hang va)) cua tre*.