Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, hieu ve
cam thuc » am thuc, nam thuc, cam thu
vat phan » va phan, van phan, sat phan
phan tai » pham tai, nhan tai, phan thi
tu triet » su triet, tu thiet, tu trien
nang xa » nang x, lang xa, nang ma
te ban » te bao
ban ky » van ky, dan ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ban ky nang xa hoi. ((hieu van) OR (lieu va)) cam thuc vat phan tai tu triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ban ky nang xa hoi. ((hieu van) OR (lieu va)) cam thuc vat phan tai tu triet".
• Adding a wildcard symbol may retrieve word variants: te ban ky nang xa hoi. ((hieu van) OR (lieu va)) cam thuc vat phan tai tu triet*.