Perhaps you should try some spelling variations:
thuc tre » thuc te, thuoc tren, thuc tien
hoi thuc » choi thuc, hoc thuc, hoi chuc
hanh hoi » hanh thoi, hanh noi, hanh hoa
quoc ban » quoc bao, quoc lan, quoc quan
duc van » duc va, duc tan, duc manh
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
ve cham » va cham, ve chat, vu cham
tang xa » trang xa, tang ma, lang xa
ky tang » ky nang, ky dang, kho tang
ve cac » va cac, vien cac

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 ky tang xa hoi. hieu ((ve cham) or (ve cac)) ((duc van) or (quoc ban)) hanh hoi thuc tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky tang xa hoi. hieu ((ve cham) OR (ve cac)) ((duc van) OR (quoc ban)) hanh hoi thuc tre.
• Adding a wildcard symbol may retrieve word variants: su sach ky tang xa hoi. hieu ((ve cham) or (ve cac)) ((duc van) or (quoc ban)) hanh hoi thuc tre*.