Perhaps you should try some spelling variations:
manh hanh » xanh hanh, danh thanh, minh thanh
toc sach » hoc sach, doc sach, thuoc sach
hieu cau » nhieu cau, hieu cac, hieu ca
cau pham » cau cham, cau phan, cau phap
duc manh » suc manh, duc anh, duc minh
va triet » va thiet, ve triet, cua triet
va trien » va truyen, va thiet, va tuyen
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
hanh vu » hanh vi, hanh va, hanh tu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ty nang xa hoi. hieu cau pham duc manh hanh vu ((va triet) OR (va trien))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ty nang xa hoi. hieu cau pham duc manh hanh vu ((va triet) OR (va trien))".
• Adding a wildcard symbol may retrieve word variants: toc sach ty nang xa hoi. hieu cau pham duc manh hanh vu ((va triet) OR (va trien))*.