Perhaps you should try some spelling variations:
thanh vai » thanh van, thanh oai, thanh va
thanh tai » thanh toan, doanh tai, thanh san
thanh hai » thanh phan, thanh hoa, thanh san
nhan luc » nang luc
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
ve nhan » ve nha, de nhan, va nhan
hieu ve » hieu va, hieu van
nang ma » tang ma, sang ma, nang cao
ty nang » ky nang, ty xang, ty hang
cua tre » cua te, cuu tre, cua triet
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: su sach ty nang ma hoa. hieu ve nhan luc va ((((thanh vai) OR (thanh hai))) or (thanh tai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang ma hoa. hieu ve nhan luc va ((((thanh vai) OR (thanh hai))) OR (thanh tai)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty nang ma hoa. hieu ve nhan luc va ((((thanh vai) OR (thanh hai))) or (thanh tai)) cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach ty nang ma hoa. hieu ve nhan luc va ((((thanh vai) OR (thanh hai))) or (thanh tai)) cua tre*.