Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thac thuc » thach thuc, thuc thuc, thac thuy
va thanh » gia thanh, va tinh, le thanh
vinh cuu » dinh cuu, sinh cua, dinh cu
hieu van » hieu va, thien van, lieu va
van thac » van hac, van tham, van than
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
vi cuu » vi luu

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 ky lang xa hoi. hieu van thac thuc ((va thanh) or (ban thanh)) ((vi cuu) OR (vinh cuu)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky lang xa hoi. hieu van thac thuc ((va thanh) OR (ban thanh)) ((vi cuu) OR (vinh cuu)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ky lang xa hoi. hieu van thac thuc ((va thanh) or (ban thanh)) ((vi cuu) OR (vinh cuu)) tre".
• Adding a wildcard symbol may retrieve word variants: vu sach ky lang xa hoi. hieu van thac thuc ((va thanh) or (ban thanh)) ((vi cuu) OR (vinh cuu)) tre*.