Perhaps you should try some spelling variations:
ve triet » va trien, su triet
va tinh » may tinh
va hanh » van hanh, va thanh, va danh
cac tuc » cac toc, cac tu, cac tac
sach ky » sac ky, sach y, sach kem
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
sach ty » sach y, sach tu, sach thu
ve cac » va cac, vien cac
vi ve » va ve, gi ve, ve ve

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 xa hoi. hieu ve cac tuc ((va hanh) or (va tinh)) vi ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ky) OR (sach ty)) nang xa hoi. hieu ve cac tuc ((va hanh) OR (va tinh)) vi ve triet.
• Adding a wildcard symbol may retrieve word variants: su ((sach ky) or (sach ty)) nang xa hoi. hieu ve cac tuc ((va hanh) or (va tinh)) vi ve triet*.