Perhaps you should try some spelling variations:
thanh van » thanh san, thanh toan, thanh phan
toc sach » hoc sach, doc sach, thuoc sach
nhan luc » nang luc
tu sach » thu sach, su sach, te sach
hanh va » hang va, hanh vi
ve nhan » ve nha, de nhan, va nhan
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
ly nang » ky nang, ly hang, ly vang
cuu tre » cua tre, cau tren, cau treo
luc va » duc va, tuc va, loc va

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 (toc sach)) ly nang xa hoi. hieu ve nhan luc va ((thanh van) or (hanh va)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (toc sach)) ly nang xa hoi. hieu ve nhan luc va ((thanh van) OR (hanh va)) cuu tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (toc sach)) ly nang xa hoi. hieu ve nhan luc va ((thanh van) or (hanh va)) cuu tre*.