Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
hieu van » hieu va, thien van, lieu va
benh noi » benh hoc, hanh noi, anh noi
lang xa » lang ha, dang xay, lang van
van cam » van nam, van lam, van cau
cam duc » cam xuc, cao duc, pham duc
ben dai » benh dai, hien dai, vien dai
y lang » o lang, _ lang, tay lang
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sach y lang xa hoi. hieu van cam duc tan ((ben dai) or (benh noi)) cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach y lang xa hoi. hieu van cam duc tan ((ben dai) OR (benh noi)) cua tu*.