Perhaps you should try some spelling variations:
vat thanh » dat thanh, gat thanh, tat thanh
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
cam thuc » am thuc, nam thuc, cam thu
ban hanh » ban hang
su sach » so sach, vu sach
sach ly » sach y, sach lo, sach ty
ly nang » ky nang, ly hang, ly vang
hieu ve » hieu va
di cua » dai cua, doi cua, de cua

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 ly nang x ho. ((hieu ve) or (hieu van)) cam thuc ((vat thanh) or (ban hanh)) di cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ly nang x ho. ((hieu ve) OR (hieu van)) cam thuc ((vat thanh) OR (ban hanh)) di cua triet.
• Adding a wildcard symbol may retrieve word variants: su sach ly nang x ho. ((hieu ve) or (hieu van)) cam thuc ((vat thanh) or (ban hanh)) di cua triet*.