Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
xa danh » va danh, dia danh, nam danh
hieu he » hieu ve, hiem he, hieu le
te sach » toc sach
ty nang » ky nang, ty hang, ly nang
ma hoi » mai hoi, xa hoi, ma hoa
va dan » ca dan, va dao, va dau
dai su » dai sua, dai so, dan su
he nam » ha nam, nghe nam

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ((ty nang) OR (ty xang)) ma hoi. hieu he nam thu ((xa danh) or (va dan)) dai su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ty nang) OR (ty xang)) ma hoi. hieu he nam thu ((xa danh) OR (va dan)) dai su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((ty nang) OR (ty xang)) ma hoi. hieu he nam thu ((xa danh) or (va dan)) dai su triet".
• Adding a wildcard symbol may retrieve word variants: te sach ((ty nang) OR (ty xang)) ma hoi. hieu he nam thu ((xa danh) or (va dan)) dai su triet*.