Perhaps you should try some spelling variations:
thanh van » thanh san, thanh toan, thanh phan
va thanh » gia thanh, ban thanh, va tinh
vien dai » hien dai
vien bac » vien bach, vien cac, mien bac
dang xa » dang xay, lang xa, dang ha
sach ky » sac ky, sach y, sach kem
sach ty » sach y, sach tu, sach thu
thue va » thuc va, thuyet va, thuc vat
van chi » van chien, luan chi, van chat
chi tre » choi tre, cho tre, chi tro

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thu ((sach ky) OR (sach ty)) dang xa hoi. hieu ((vien bac) or (vien dai)) thue va thanh van chi tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach ky) OR (sach ty)) dang xa hoi. hieu ((vien bac) OR (vien dai)) thue va thanh van chi tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((sach ky) OR (sach ty)) dang xa hoi. hieu ((vien bac) or (vien dai)) thue va thanh van chi tre".
• Adding a wildcard symbol may retrieve word variants: thu ((sach ky) OR (sach ty)) dang xa hoi. hieu ((vien bac) or (vien dai)) thue va thanh van chi tre*.