Perhaps you should try some spelling variations:
lang van » dang van, hoang van, giang van
tang van » dang van, hoang van, trong van
van hanh » van thanh, ban hanh, van anh
su sach » so sach, vu sach
tang ma » mang may
qua cai » qua hai, qua cac, qua ca
cai duc » cao duc, mai duc, hoai duc
duc van » duc va, duc tan, duc manh
vi cua » vai cua, di cua
cua tu » cua tuc, cua su, cua cu

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 y ((tang ma) or (((lang van) OR (tang van)))) hoi. hieu qua cai duc van hanh vi cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y ((tang ma) OR (((lang van) OR (tang van)))) hoi. hieu qua cai duc van hanh vi cua tu*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y ((tang ma) or (((lang van) OR (tang van)))) hoi. hieu qua cai duc van hanh vi cua tu*".