Perhaps you should try some spelling variations:
thuyet mach » thuyet xac, thuyet cac, thuyet anh
hoc thuyet » hoc chuyen
luan nhung » luan chung, luan hung, quan nhung
cong thanh » dong thanh, cong trinh, truong thanh
hanh tang » hanh trang, anh tang, hanh mang
tang luan » dung luan
cong tan » cong tac, cong san, cong ty
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thuyet mach - hanh tang luan nhung ((cong thanh) OR (cong tan)) toan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thuyet mach - hanh tang luan nhung ((cong thanh) OR (cong tan)) toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc thuyet mach - hanh tang luan nhung ((cong thanh) OR (cong tan)) toan ban*.