Perhaps you should try some spelling variations:
manh tuong » manh tung, manh cuong, minh tuong
sach duoc » sach nuoc, sach dao, sach dung
tuong hoc » truong hoc, tuong ho, duong hoc
thanh van » thanh san, thanh toan, thanh phan
duoc lap » duoc lam, doc lap, duoc lac
hoc manh » hoc anh, hoc hanh, hoc danh
hai quan » tac quan
phan van » pham van, luan van, tran van
su sach » so sach, vu sach
cuu mot » cua mot, cuu mo, huu mot
mot hoc » mon hoc, mo hoc, mot goc
tap hai » tap bai, tap dai, tai hai

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 duoc lap, nghien cuu mot hoc manh tuong hoc tap hai quan ((phan van) or (thanh van))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach duoc lap, nghien cuu mot hoc manh tuong hoc tap hai quan ((phan van) OR (thanh van)).
• Adding a wildcard symbol may retrieve word variants: su sach duoc lap, nghien cuu mot hoc manh tuong hoc tap hai quan ((phan van) or (thanh van))*.