Perhaps you should try some spelling variations:
thanh son » thanh san, thanh cong, thanh toan
thanh soc » nhanh soc, thanh hoc, thanh ngoc
hieu van » hieu va, thien van, lieu va
va hanh » van hanh, va thanh, va danh
sach ky » sac ky, sach ty, sach kem
dang xa » dang xay, lang xa, dang ha
cuu tre » cua tre, cau tren, cau treo
vi cuu » vi luu, vinh cuu

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

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