Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
dan hanh » dang hanh, dan khanh, dan thanh
thuc dan » thuc hanh, hoc dan, thuc vat
nam thuc » nam thuoc, am thuc, nam thu
hieu he » hieu ve, hiem he, hieu le
nang xa » nang x, lang xa, nang ma
sang ma » tang ma, nang ma, sang tao
sach v » sach va, sach y, sach vay
he nam » ha nam, nghe nam
sach 2 » sach y
vi cua » vai cua, di 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 v) or (sach 2)) ((nang xa) or (sang ma)) hoi. hieu he nam thuc dan hanh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach v) OR (sach 2)) ((nang xa) OR (sang ma)) hoi. hieu he nam thuc dan hanh vi cua triet.
• Adding a wildcard symbol may retrieve word variants: su ((sach v) or (sach 2)) ((nang xa) or (sang ma)) hoi. hieu he nam thuc dan hanh vi cua triet*.