Perhaps you should try some spelling variations:
thuat tach » thuat mach, thuat tac, thuat thanh
thuat sach » thuat lanh, thuat san
hanh trung » thanh trung, hanh trang, manh trung
trung phan » trung thanh, trung ha, dung phan
phan tuong » phan thuong, phan truong, phan xuong
tuong cong » truong cong, trong cong, tong cong
cong toan » cong tan, cong hoan, cong tuan
toan phan » thanh phan, toan ban, hoa phan
phan van » pham van, thanh van, luan van

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thuat tach) or (thuat sach)) - hanh trung phan tuong cong toan phan van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thuat tach) OR (thuat sach)) - hanh trung phan tuong cong toan phan van*.