Perhaps you should try some spelling variations:
thuc day » thuc dan
su sach » so sach, vu sach
hanh de » hanh ve, hanh kem
hanh di » hanh vi, hang di, danh di
sach ly » sach y, sach lo, sach ty
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
ly nang » ky nang, ly hang, ly vang
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: su sach ly nang xa hoi. hieu ve cam ((thuc day) or (thuc vat)) ((hanh di) or (hanh de)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ly nang xa hoi. hieu ve cam ((thuc day) OR (thuc vat)) ((hanh di) OR (hanh de)) cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach ly nang xa hoi. hieu ve cam ((thuc day) or (thuc vat)) ((hanh di) or (hanh de)) cua tre*.