Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
cau tren » cu tren, dau tren, ca tren
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
tuoc va » thuoc va, nuoc va, duoc va
thuc va » thuc vat, thuc dan, thuc day
duoc ma » duoc lam
danh du » danh dau, danh tu, dinh du
y nang » ky nang, ly nang, v nang
du cau » cu cau, da cau, di cau

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 y nang xa hoi. hieu vien bach ((((tuoc va) or (thuc va))) or (duoc ma)) danh du cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang xa hoi. hieu vien bach ((((tuoc va) OR (thuc va))) OR (duoc ma)) danh du cau tren.
• Adding a wildcard symbol may retrieve word variants: su sach y nang xa hoi. hieu vien bach ((((tuoc va) or (thuc va))) or (duoc ma)) danh du cau tren*.