Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
thuc van » thuc vat, thuc va, thuc hanh
thuc dan » thuc hanh, hoc dan, thuc vat
manh hai » lanh hai, minh hai, thanh hai
cau treo » cau theo, cau tren, cau triet
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
van cam » van nam, van lam, van cau
hai cau » hai chau, hai chu, hai hau
y nang » ky nang, ly nang, v nang

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 van cam ((thuc van) OR (thuc dan)) manh hai cau treo~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang xa hoi. hieu van cam ((thuc van) OR (thuc dan)) manh hai cau treo".
• Adding a wildcard symbol may retrieve word variants: su sach y nang xa hoi. hieu van cam ((thuc van) OR (thuc dan)) manh hai cau treo*.