Perhaps you should try some spelling variations:
thuoc sach » nuoc sach, thuat sach, thuoc sinh
pham thuc » phap thuc, pham chuc, nham thuc
hoc sach » hoc sinh, hoc cac, hoc anh
hanh di » hanh vi, hang di, danh di
nang co » nang cao, nang doc, nang noi
hanh de » hanh ve, hanh kem
v pham » vi pham, d pham
hieu v » hieu va, hieu ve, hieu 2
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thuoc sach) OR (hoc sach)) ky nang co hoc. hieu v pham thuc vat ((hanh di) or (hanh de)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuoc sach) OR (hoc sach)) ky nang co hoc. hieu v pham thuc vat ((hanh di) OR (hanh de)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thuoc sach) OR (hoc sach)) ky nang co hoc. hieu v pham thuc vat ((hanh di) or (hanh de)) cua te".
• Adding a wildcard symbol may retrieve word variants: ((thuoc sach) OR (hoc sach)) ky nang co hoc. hieu v pham thuc vat ((hanh di) or (hanh de)) cua te*.