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

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 xa 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 xa 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 xa hoi. hieu he nam thu ((xa danh) or (va dan)) dai su triet*.