Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
va thanh » gia thanh, ban thanh, va tinh
hang dau » hang va, hang tai
lang xa » lang ha, dang xay, lang van
ky hang » ky nang, ly hang, ky dang
sach tu » sach thu, cach tu, sach ty
va hanh » van hanh, va danh, ban hanh
nang xa » nang x, nang ma, mang xa
vu sach » vu bach, su sach, vu khach
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: vu sach tu ((nang xa) OR (lang xa)) hoi. hieu ky hang dau ((va hanh) or (va thanh)) vi su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach tu ((nang xa) OR (lang xa)) hoi. hieu ky hang dau ((va hanh) OR (va thanh)) vi su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach tu ((nang xa) OR (lang xa)) hoi. hieu ky hang dau ((va hanh) or (va thanh)) vi su triet".
• Adding a wildcard symbol may retrieve word variants: vu sach tu ((nang xa) OR (lang xa)) hoi. hieu ky hang dau ((va hanh) or (va thanh)) vi su triet*.