Perhaps you should try some spelling variations:
sang tai » sang tao, tang tai, sang than
hang tai » hang va
luoc van » luoc can, luoc va, luc van
tai cuu » tai cuc, tai buu, tai cua
duc van » duc va, duc tan, duc manh
te sach » toc sach
hieu ve » hieu va, hieu van
sach ky » sac ky, sach y, sach ty
cuu tre » cua tre, cau tren, cau treo
ve cam » ve cham, ve cac, va cam

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 ((sang tai) OR (hang tai)) khoa. hieu ve cam ((luoc van) or (duc van)) dung tai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky ((sang tai) OR (hang tai)) khoa. hieu ve cam ((luoc van) OR (duc van)) dung tai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky ((sang tai) OR (hang tai)) khoa. hieu ve cam ((luoc van) or (duc van)) dung tai cuu tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky ((sang tai) OR (hang tai)) khoa. hieu ve cam ((luoc van) or (duc van)) dung tai cuu tre*.