Perhaps you should try some spelling variations:
chat truc » cau truc, chat xuc
thu sach » tu sach, thuat sach, thuoc sach
dua tren » dung tren
danh dai » danh dau, danh di, danh sai
hieu cac » hieu luc, hieu va, hieu van
cac chat » cao chat, cac thuat, cac nha
lang van » dang van, tang van, hoang van
sach ky » sac ky, sach y, sach ty
truc va » thuc va, thuc vat, trung va
va danh » va dinh, va dan, va hanh
nang xa » nang x, lang xa, nang ma
cuu tre » cua tre, cau tren, cau treo

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 ((nang xa) or (lang van)) hoi. hieu cac chat truc va danh dai ((dua tren) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky ((nang xa) OR (lang van)) hoi. hieu cac chat truc va danh dai ((dua tren) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: thu sach ky ((nang xa) or (lang van)) hoi. hieu cac chat truc va danh dai ((dua tren) or (cuu tre))*.