Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
su triet » su viet, su tien, ve triet
thanh di » thanh doi, thanh de, thanh do
truc ban » thuc ban, truc dan, truc van
cam truc » cau truc, nam truc, lam truoc
hieu va » lieu va, hieu qua
su sach » so sach
nang xa » nang x, nang ma, mang xa
vu sach » vu bach, vu khach
lang xa » lang ha, dang xay, lang van
va cam » va cham, va cac, va cao
di su » doi su, ki su, da 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) OR (vu sach)) lo ((nang xa) or (lang xa)) hoi. hieu va cam truc ban thanh di su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) lo ((nang xa) OR (lang xa)) hoi. hieu va cam truc ban thanh di su triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (vu sach)) lo ((nang xa) or (lang xa)) hoi. hieu va cam truc ban thanh di su triet*".