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