Perhaps you should try some spelling variations:
van tham » van thanh, van tuan, van chat
hieu van » hieu va, thien van, lieu va
thanh ve » thanh va, thanh vien, thanh van
tham toc » thac toc, tham nuoc, tham thuc
hanh ve » hanh vi, hanh va, hanh kem
toc gia » toc giay, tac gia, quoc gia
sach ty » sach y, sach tu, sach thu
vu sach » vu bach, su sach, vu khach
lang xa » lang ha, dang xay, lang van
nang xa » nang x, nang ma, mang xa
tu tren » tu truyen, tu tieng, tu trong

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 ty ((nang xa) or (lang xa)) hoi. hieu van tham toc gia ((thanh ve) or (hanh ve)) tu tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ty ((nang xa) OR (lang xa)) hoi. hieu van tham toc gia ((thanh ve) OR (hanh ve)) tu tren.
• Adding a wildcard symbol may retrieve word variants: vu sach ty ((nang xa) or (lang xa)) hoi. hieu van tham toc gia ((thanh ve) or (hanh ve)) tu tren*.