Perhaps you should try some spelling variations:
thanh van » thanh san, thanh toan, thanh phan
thanh tai » thanh hai, thanh toan, doanh tai
nhan luc » nang luc
cua tre » cua te, cua triet, dua tren
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
cuu 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: su sach ty nang ma hoa. hieu ve nhan luc va ((thanh van) or (thanh tai)) ((cua tre) OR (cuu 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 van) OR (thanh tai)) ((cua tre) OR (cuu 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 van) or (thanh tai)) ((cua tre) OR (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: su sach ty nang ma hoa. hieu ve nhan luc va ((thanh van) or (thanh tai)) ((cua tre) OR (cuu tre))*.