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

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