Perhaps you should try some spelling variations:
thuc van » thuc vat, thuc dan, thuc va
hanh de » hanh ve, hanh kem
hanh di » hanh vi, hang di, danh di
duc van » duc va, duc tan, duc manh
cua tre » cua te, cuu tre, cua triet
hieu va » lieu va, hieu qua
tang xa » trang xa, tang ma, lang xa
ky tang » ky nang, ky dang, kho tang
sac ky » cac ky, sai ky
va cam » va cham, va cac, va cao
tu sac » tu sach, tu cac, tu san

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 tang xa hoi. hieu va cam ((thuc van) or (duc van)) ((hanh di) or (hanh de)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky tang xa hoi. hieu va cam ((thuc van) OR (duc van)) ((hanh di) OR (hanh de)) cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sac ky tang xa hoi. hieu va cam ((thuc van) or (duc van)) ((hanh di) or (hanh de)) cua tre*.