Perhaps you should try some spelling variations:
thuat mach » thuat tach, thuyet mach, thuat lanh
thuat sach » thuat lanh, thuat san
hanh trung » thanh trung, hanh trang, manh trung
trung phan » trung thanh, trung ha, dung phan
phan luong » phan xuong, phan thuong, phan truong
luong cong » dung cong, trong cong, cong cong
cong tan » cong tac, cong san, cong thanh
tan pham » tuan pham, san pham, tac pham

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 mach) or (thuat sach)) - hanh trung phan luong cong tan pham thi~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thuat mach) OR (thuat sach)) - hanh trung phan luong cong tan pham thi*.