Perhaps you should try some spelling variations:
lang hoa » hang hoa, lang ha, nang hoa
thuc van » thuc vat, thuc dan, thuc va
ky lang » ky nang, ky dang, ky tang
hoa hoi » khoa hoi, hoa hoc, hoa doi
hieu ve » hieu va, hieu van
duc van » duc va, duc tan, duc manh
hanh di » hanh vi, hanh de, hang di
cua tre » cua te, cuu tre, cua triet
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
ve cam » ve cham, ve cac, va cam
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky lang hoa hoi. hieu ve cam ((thuc van) or (duc van)) hanh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky lang hoa hoi. hieu ve cam ((thuc van) OR (duc van)) hanh di cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sac ky lang hoa hoi. hieu ve cam ((thuc van) or (duc van)) hanh di cua tre*.