Perhaps you should try some spelling variations:
te sach » toc sach
danh de » hanh de, dan de, dang de
va danh » va dinh, va dan, va hanh
truc va » thuc va, thuc vat, trung va
van bac » van ban, van bao, van hac
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, mang may
cua tre » cua te, cuu tre, cua triet
van ha » van hoa, van chat, van hanh
de cua » le cua, te cua, dieu cua

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 ((nang ma) OR (nang cao)) hoa. hieu ((van bac) or (van ha)) truc va danh de cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky ((nang ma) OR (nang cao)) hoa. hieu ((van bac) OR (van ha)) truc va danh de cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky ((nang ma) OR (nang cao)) hoa. hieu ((van bac) or (van ha)) truc va danh de cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky ((nang ma) OR (nang cao)) hoa. hieu ((van bac) or (van ha)) truc va danh de cua tre*.