Perhaps you should try some spelling variations:
hoc hanh » hoc nhanh, hoc thanh, hoc anh
cac phan » cac nhan, cao phan, cap phan
hanh hoa » thanh hoa, khanh hoa, hang hoa
phan van » pham van, thanh van, luan van
cao tai » cao tang
cuu mot » cua mot, cuu mo, huu mot
mot hoc » mon hoc, mo hoc, mot goc
dao tai » dao thai, dao tao, dao thi
hoi cac » hoc cac, voi cac, hoa cac
hoc xa » hoc ma
te van » le van, ve van, ta van
te va » tu va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te van) or (te va)) ((dao tai) OR (cao tai)), nghien cuu mot hoc hanh hoa hoc xa hoi cac phan van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te van) OR (te va)) ((dao tai) OR (cao tai)), nghien cuu mot hoc hanh hoa hoc xa hoi cac phan van.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te van) or (te va)) ((dao tai) OR (cao tai)), nghien cuu mot hoc hanh hoa hoc xa hoi cac phan van".
• Adding a wildcard symbol may retrieve word variants: ((te van) or (te va)) ((dao tai) OR (cao tai)), nghien cuu mot hoc hanh hoa hoc xa hoi cac phan van*.