Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
nhan luc » nang luc
van nhan » van phan, van thanh, danh nhan
cuu tre » cau tren, cau treo
va hanh » van hanh, va thanh, va danh
sach ky » sac ky, sach y, sach ty
tu sach » thu sach, su sach, te sach
tang ma » mang may, tang van
tang ha » lang ha, trung ha, tang van
cua tre » cua te, cua triet, dua tren
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 ky ((tang ha) OR (tang ma)) hoi. hieu van nhan luc va hanh vi ((cuu tre) OR (cua tre))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky ((tang ha) OR (tang ma)) hoi. hieu van nhan luc va hanh vi ((cuu tre) OR (cua tre))".
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((tang ha) OR (tang ma)) hoi. hieu van nhan luc va hanh vi ((cuu tre) OR (cua tre))*.