Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
thanh van » thanh san, thanh toan, thanh phan
dau tren » dau tien, dat tren, dau tieng
tu sach » thu sach, su sach, te sach
van dau » van dao, phan dau
cam tu » cam thu, nam tu, tam tu
dam tu » nam tu, tam tu, dam thuc
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 (thuat sach)) ky nang x hoi. lieu va ((cam tu) or (dam tu)) gia thanh van dau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thuat sach)) ky nang x hoi. lieu va ((cam tu) OR (dam tu)) gia thanh van dau tren.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thuat sach)) ky nang x hoi. lieu va ((cam tu) or (dam tu)) gia thanh van dau tren*.