Perhaps you should try some spelling variations:
tu truyen » co truyen, di truyen
tham nuoc » thay nuoc, thoat nuoc, nha nuoc
thanh ve » thanh va, thanh vien, thanh van
nuoc gia » nuoc giai, nuoc giao, quoc gia
hieu van » hieu va, thien van, lieu va
van tham » van thanh, van tuan, van chat
lang xa » lang ha, dang xay, lang van
sach ty » sach y, sach tu, sach thu
nang xa » nang x, nang ma, mang xa
hanh ve » hanh vi, hanh va, hanh kem
su sach » so sach, vu sach

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